diff --git a/pwiz_tools/Skyline/Executables/UniModCompiler/InputFiles/unimod.xml b/pwiz_tools/Skyline/Executables/UniModCompiler/InputFiles/unimod.xml
index 393e12799b..c70a0dda6d 100644
--- a/pwiz_tools/Skyline/Executables/UniModCompiler/InputFiles/unimod.xml
+++ b/pwiz_tools/Skyline/Executables/UniModCompiler/InputFiles/unimod.xml
@@ -383,29 +383,27 @@
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2016-02-01 14:16:51"
+                date_time_modified="2011-11-21 13:05:07"
                 approved="1"
                 record_id="4">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Artefact"
-                           spec_group="9"/>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Artefact"
-                           spec_group="8"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="Artefact"
                            spec_group="7"/>
          <umod:specificity hidden="1" site="E" position="Anywhere" classification="Artefact"
                            spec_group="6"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
-                           spec_group="4"/>
          <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
                            spec_group="5"/>
+         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
+                           spec_group="4"/>
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Artefact"
                            spec_group="3"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
                            spec_group="2"/>
          <umod:specificity hidden="0" site="C" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="U" position="Anywhere" classification="Chemical derivative"
-                           spec_group="10"/>
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Artefact"
+                           spec_group="8"/>
+         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Artefact"
+                           spec_group="9"/>
          <umod:delta mono_mass="57.021464" avge_mass="57.0513" composition="H(3) C(2) N O">
             <umod:element symbol="H" number="3"/>
             <umod:element symbol="C" number="2"/>
@@ -414,12 +412,7 @@
          </umod:delta>
          <umod:alt_name>Carboxyamidomethylation</umod:alt_name>
          <umod:xref>
-            <umod:text>12422359</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Boja, E. S., Fales, H. M., Anal. Chem. 73 3576-82 (2001)</umod:text>
+            <umod:text>Creasy, D. M., Cottrell, J. S., Proteomics 2 1426-34 (2002)</umod:text>
             <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
@@ -429,10 +422,15 @@
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>Creasy, D. M., Cottrell, J. S., Proteomics 2 1426-34 (2002)</umod:text>
+            <umod:text>Boja, E. S., Fales, H. M., Anal. Chem. 73 3576-82 (2001)</umod:text>
             <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
+         <umod:xref>
+            <umod:text>12422359</umod:text>
+            <umod:source>PubMed PMID</umod:source>
+            <umod:url/>
+         </umod:xref>
       </umod:mod>
       <umod:mod title="Carbamyl" full_name="Carbamylation" username_of_poster="unimod"
                 group_of_poster="admin"
@@ -506,7 +504,7 @@
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2016-02-01 14:17:55"
+                date_time_modified="2006-10-16 10:21:50"
                 approved="1"
                 record_id="6">
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Artefact"
@@ -519,8 +517,6 @@
                            spec_group="4">
             <umod:misc_notes>Hydroxylethanone</umod:misc_notes>
          </umod:specificity>
-         <umod:specificity hidden="1" site="U" position="Anywhere" classification="Chemical derivative"
-                           spec_group="5"/>
          <umod:delta mono_mass="58.005479" avge_mass="58.0361" composition="H(2) C(2) O(2)">
             <umod:element symbol="H" number="2"/>
             <umod:element symbol="C" number="2"/>
@@ -1291,29 +1287,33 @@
       <umod:mod title="Methyl" full_name="Methylation" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2015-08-26 14:39:25"
+                date_time_modified="2006-10-14 10:32:35"
                 approved="1"
                 record_id="34">
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
+                           spec_group="14"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
+                           spec_group="13"/>
+         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
+                           classification="Post-translational"
+                           spec_group="10"/>
          <umod:specificity hidden="0" site="E" position="Anywhere" classification="Post-translational"
                            spec_group="12"/>
          <umod:specificity hidden="0" site="D" position="Anywhere" classification="Post-translational"
                            spec_group="12"/>
          <umod:specificity hidden="0" site="C-term" position="Any C-term" classification="Multiple"
                            spec_group="11"/>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Post-translational"
-                           spec_group="10"/>
          <umod:specificity hidden="1" site="L" position="Anywhere" classification="Post-translational"
                            spec_group="9"/>
          <umod:specificity hidden="1" site="I" position="Anywhere" classification="Post-translational"
                            spec_group="8"/>
          <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                            spec_group="7"/>
-         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Post-translational"
-                           spec_group="6"/>
          <umod:specificity hidden="1" site="N-term" position="Any N-term"
                            classification="Chemical derivative"
                            spec_group="5"/>
+         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Post-translational"
+                           spec_group="6"/>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                            spec_group="4"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
@@ -1322,67 +1322,63 @@
                            spec_group="2"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
-                           spec_group="13"/>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
-                           spec_group="14"/>
          <umod:delta mono_mass="14.015650" avge_mass="14.0266" composition="H(2) C">
             <umod:element symbol="H" number="2"/>
             <umod:element symbol="C" number="1"/>
          </umod:delta>
          <umod:alt_name>methyl ester</umod:alt_name>
          <umod:xref>
-            <umod:text>AA0105</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>METH</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>11875433</umod:text>
-            <umod:source>PubMed PMID</umod:source>
+            <umod:text>AA0318</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0072</umod:text>
+            <umod:text>AA0338</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0299</umod:text>
+            <umod:text>AA0064</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0337</umod:text>
+            <umod:text>AA0061</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0317</umod:text>
+            <umod:text>AA0063</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0273</umod:text>
+            <umod:text>AA0065</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0234</umod:text>
+            <umod:text>AA0069</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0073</umod:text>
+            <umod:text>AA0336</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0070</umod:text>
+            <umod:text>AA0305</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0071</umod:text>
+            <umod:text>AA0272</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -1392,71 +1388,66 @@
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0272</umod:text>
+            <umod:text>AA0071</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0305</umod:text>
+            <umod:text>AA0070</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0336</umod:text>
+            <umod:text>AA0073</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0069</umod:text>
+            <umod:text>AA0234</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0065</umod:text>
+            <umod:text>AA0273</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0063</umod:text>
+            <umod:text>AA0317</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0061</umod:text>
+            <umod:text>AA0337</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0064</umod:text>
+            <umod:text>AA0299</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0338</umod:text>
+            <umod:text>AA0072</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0318</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>11875433</umod:text>
+            <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>METH</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0105</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Identification and Validation of Eukaryotic Aspartate and Glutamate Methylation in Proteins</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2921173&amp;tool=pmcentrez&amp;rendertype=abstract</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Oxidation" full_name="Oxidation or Hydroxylation"
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2016-02-01 14:24:08"
+                date_time_modified="2008-02-15 05:37:07"
                 approved="0"
                 record_id="35">
          <umod:specificity hidden="0" site="W" position="Anywhere" classification="Artefact"
@@ -1489,67 +1480,60 @@
          </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                            spec_group="3"/>
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                            spec_group="2"/>
+         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
+                           spec_group="1"/>
          <umod:specificity hidden="1" site="G" position="Any C-term" classification="Pre-translational"
                            spec_group="11">
             <umod:misc_notes>Hydroxyglycine derivative in amidation pathway</umod:misc_notes>
          </umod:specificity>
-         <umod:specificity hidden="1" site="U" position="Anywhere" classification="Multiple"
-                           spec_group="12"/>
          <umod:delta mono_mass="15.994915" avge_mass="15.9994" composition="O">
             <umod:element symbol="O" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>AA0235</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>HYDR</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0027</umod:text>
+            <umod:text>AA0322</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>11461766</umod:text>
+            <umod:text>11212008</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0028</umod:text>
-            <umod:source>RESID</umod:source>
-            <umod:url/>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>9004526</umod:text>
+            <umod:text>11120890</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0030</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>DOPA</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0029</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>CSEA</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>Lagerwerf FM, van de Weert M, Heerma W, Haverkamp J, Rapid Commun Mass Spectrom. 1996;10(15):1905-10</umod:text>
-            <umod:source>Journal</umod:source>
+            <umod:text>14661084</umod:text>
+            <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0215</umod:text>
+            <umod:text>AA0026</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0205</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
+            <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
@@ -1558,48 +1542,53 @@
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
-            <umod:source>Journal</umod:source>
+            <umod:text>AA0205</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0026</umod:text>
+            <umod:text>AA0215</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>14661084</umod:text>
-            <umod:source>PubMed PMID</umod:source>
+            <umod:text>Lagerwerf FM, van de Weert M, Heerma W, Haverkamp J, Rapid Commun Mass Spectrom. 1996;10(15):1905-10</umod:text>
+            <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>CSEA</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0029</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>DOPA</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0030</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>11120890</umod:text>
+            <umod:text>9004526</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>11212008</umod:text>
+            <umod:text>AA0028</umod:text>
+            <umod:source>RESID</umod:source>
+            <umod:url/>
+         </umod:xref>
+         <umod:xref>
+            <umod:text>11461766</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0322</umod:text>
+            <umod:text>AA0027</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>HYDR</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0235</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
@@ -1626,25 +1615,21 @@
       <umod:mod title="Dimethyl" full_name="di-Methylation" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2014-11-16 07:37:54"
+                date_time_modified="2006-10-18 14:35:31"
                 approved="1"
                 record_id="36">
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="6">
-            <umod:misc_notes>When dimethyl labelling is pre-digest</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="P" position="Protein N-term"
-                           classification="Post-translational"
-                           spec_group="5"/>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="Post-translational"
                            spec_group="4"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
+         <umod:specificity hidden="1" site="N-term" position="Any N-term"
+                           classification="Chemical derivative"
                            spec_group="3"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Multiple"
-                           spec_group="1"/>
          <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                            spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
+                           spec_group="1"/>
+         <umod:specificity hidden="1" site="P" position="Protein N-term"
+                           classification="Post-translational"
+                           spec_group="5"/>
          <umod:delta mono_mass="28.031300" avge_mass="28.0532" composition="H(4) C(2)">
             <umod:element symbol="H" number="4"/>
             <umod:element symbol="C" number="2"/>
@@ -1693,7 +1678,7 @@
       <umod:mod title="Trimethyl" full_name="tri-Methylation" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2015-05-22 13:05:59"
+                date_time_modified="2011-02-03 10:02:45"
                 approved="1"
                 record_id="37">
          <umod:specificity hidden="1" site="A" position="Protein N-term"
@@ -1703,30 +1688,50 @@
                            spec_group="2"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                            spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
             <umod:NeutralLoss mono_mass="59.073499" avge_mass="59.1103" flag="false"
                               composition="H(9) C(3) N">
                <umod:element symbol="H" number="9"/>
                <umod:element symbol="C" number="3"/>
                <umod:element symbol="N" number="1"/>
             </umod:NeutralLoss>
+            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
          </umod:specificity>
          <umod:delta mono_mass="42.046950" avge_mass="42.0797" composition="H(6) C(3)">
             <umod:element symbol="H" number="6"/>
             <umod:element symbol="C" number="3"/>
          </umod:delta>
+         <umod:xref>
+            <umod:text>Zhang, K. et al. 2004. Differentiation between
+
+peptides containing acetylated or tri-methylated
+
+lysines by mass spectrometry: an application
+
+for determining lysine 9 acetylation
+
+and methylation of histone H3. Proteomics
+
+4:1-10.</umod:text>
+            <umod:source>Journal</umod:source>
+            <umod:url/>
+         </umod:xref>
          <umod:xref>
             <umod:text>TRIMETH</umod:text>
             <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0062</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>Explanation of why RESID gives the delta as 43 Da</umod:text>
+            <umod:source>Misc. URL</umod:source>
+            <umod:url>http://www.ebi.ac.uk/RESID/faq.html#q12</umod:url>
+         </umod:xref>
+         <umod:xref>
+            <umod:text>J. Hirota et. al., Rapid Commun. Mass Spectrom., 17 371-6 (2003)</umod:text>
+            <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0074</umod:text>
+            <umod:text>AA0062</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -1736,25 +1741,15 @@
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>Zhang, K. et al. 2004. Differentiation between peptides containing acetylated or tri-methylated lysines by mass spectrometry: an application for determining lysine 9 acetylation and methylation of histone H3. Proteomics 4:1-10.</umod:text>
-            <umod:source>Journal</umod:source>
+            <umod:text>AA0074</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Explanation of why RESID gives the delta as 43 Da</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://pir.georgetown.edu/resid/faq.shtml#q12</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>Role of arginine and its methylated derivatives in cancer biology and treatment</umod:text>
             <umod:source>Misc. URL</umod:source>
             <umod:url>http://www.cancerci.com/content/1/1/3</umod:url>
          </umod:xref>
-         <umod:xref>
-            <umod:text>J. Hirota et. al., Rapid Commun. Mass Spectrom., 17 371-6 (2003)</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url/>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Methylthio" full_name="Beta-methylthiolation"
                 username_of_poster="unimod"
@@ -1898,62 +1893,41 @@
       <umod:mod title="Hex" full_name="Hexose" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2015-05-01 15:05:20"
+                date_time_modified="2011-11-21 13:57:35"
                 approved="1"
                 record_id="41">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="O-linked glycosylation"
+         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Other glycosylation"
                            spec_group="8"/>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="N-linked glycosylation"
+         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other glycosylation"
                            spec_group="7"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other glycosylation"
                            spec_group="6"/>
          <umod:specificity hidden="1" site="W" position="Anywhere" classification="Other glycosylation"
                            spec_group="5"/>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="4">
-            <umod:NeutralLoss mono_mass="162.052824" avge_mass="162.1406" flag="false" composition="Hex">
-               <umod:element symbol="H" number="10"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="5"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
-                           spec_group="1">
-            <umod:misc_notes>glycation</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="4">
-            <umod:NeutralLoss mono_mass="162.052824" avge_mass="162.1406" flag="false" composition="Hex">
-               <umod:element symbol="H" number="10"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="5"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Other glycosylation"
+                           spec_group="4"/>
          <umod:specificity hidden="1" site="N-term" position="Any N-term"
                            classification="Other glycosylation"
                            spec_group="3">
             <umod:misc_notes>glycation</umod:misc_notes>
          </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="162.052824" avge_mass="162.1406" flag="false" composition="Hex">
-               <umod:element symbol="H" number="10"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="5"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="162.052824" avge_mass="162.1406" composition="Hex">
-            <umod:element symbol="H" number="10"/>
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
+                           spec_group="1">
+            <umod:misc_notes>glycation</umod:misc_notes>
+         </umod:specificity>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
+                           spec_group="9"/>
+         <umod:delta mono_mass="162.052824" avge_mass="162.1406" composition="Hex">
+            <umod:element symbol="H" number="10"/>
             <umod:element symbol="C" number="6"/>
             <umod:element symbol="O" number="5"/>
          </umod:delta>
-         <umod:alt_name>Mannose</umod:alt_name>
          <umod:alt_name>Galactose</umod:alt_name>
          <umod:alt_name>Glucose</umod:alt_name>
          <umod:alt_name>Fructose</umod:alt_name>
+         <umod:alt_name>Mannose</umod:alt_name>
          <umod:xref>
             <umod:text>CMAN</umod:text>
             <umod:source>FindMod</umod:source>
@@ -2029,39 +2003,15 @@
       <umod:mod title="HexNAc" full_name="N-Acetylhexosamine" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2002-08-19 19:17:11"
-                date_time_modified="2015-05-01 15:07:13"
+                date_time_modified="2006-10-16 15:10:27"
                 approved="1"
                 record_id="43">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="203.079373" avge_mass="203.1925" flag="false" composition="HexNAc">
-               <umod:element symbol="H" number="13"/>
-               <umod:element symbol="C" number="8"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="5"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="203.079373" avge_mass="203.1925" flag="false" composition="HexNAc">
-               <umod:element symbol="H" number="13"/>
-               <umod:element symbol="C" number="8"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="5"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Other glycosylation"
+                           spec_group="3"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
+                           spec_group="2"/>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="203.079373" avge_mass="203.1925" flag="false" composition="HexNAc">
-               <umod:element symbol="H" number="13"/>
-               <umod:element symbol="C" number="8"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="5"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="203.079373" avge_mass="203.1925" composition="HexNAc">
             <umod:element symbol="H" number="13"/>
             <umod:element symbol="C" number="8"/>
@@ -2069,27 +2019,27 @@
             <umod:element symbol="O" number="5"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>3086323</umod:text>
-            <umod:source>PubMed PMID</umod:source>
+            <umod:text>GLCN</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0155</umod:text>
+            <umod:text>AA0151</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>GLCN</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0154</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0151</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>3086323</umod:text>
+            <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0154</umod:text>
+            <umod:text>AA0155</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -2469,52 +2419,36 @@
          </umod:xref>
          <umod:misc_notes>A lipid-type modification. HNE forms a Michael addition product on Cysteine, Histidine and Lysines. Unusually, it doesn\'t replace a hydrogen on the amino acid side chain.</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="Glucuronyl" full_name="hexuronic acid" username_of_poster="jcottrell"
+      <umod:mod title="Glucuronyl" full_name="N-glucuronylation" username_of_poster="jcottrell"
                 group_of_poster="users"
                 date_time_posted="2002-10-01 21:36:48"
-                date_time_modified="2015-05-06 10:56:38"
+                date_time_modified="2006-10-16 17:26:21"
                 approved="1"
                 record_id="54">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="176.032088" avge_mass="176.1241" flag="false" composition="HexA">
-               <umod:element symbol="H" number="8"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="6"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="176.032088" avge_mass="176.1241" flag="false" composition="HexA">
-               <umod:element symbol="H" number="8"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="6"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="N-linked glycosylation"
+                           classification="Post-translational"
                            spec_group="1"/>
-         <umod:delta mono_mass="176.032088" avge_mass="176.1241" composition="HexA">
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
+                           spec_group="2"/>
+         <umod:delta mono_mass="176.032088" avge_mass="176.1241" composition="H(8) C(6) O(6)">
             <umod:element symbol="H" number="8"/>
             <umod:element symbol="C" number="6"/>
             <umod:element symbol="O" number="6"/>
          </umod:delta>
          <umod:alt_name>glucuronosyl</umod:alt_name>
          <umod:xref>
-            <umod:text>AA0058</umod:text>
+            <umod:text>AA0291</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>Lin, T.S. Kolattukudy, P.E., Eur. J. Biochem. 106, 341-351, 1980</umod:text>
-            <umod:source>Journal</umod:source>
+            <umod:text>AA0058</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0291</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>Lin, T.S. Kolattukudy, P.E., Eur. J. Biochem. 106, 341-351, 1980</umod:text>
+            <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
@@ -3374,7 +3308,7 @@
       <umod:mod title="NHS-LC-Biotin" full_name="NHS-LC-Biotin" username_of_poster="toppolzer"
                 group_of_poster="users"
                 date_time_posted="2002-12-04 09:55:19"
-                date_time_modified="2015-05-07 10:57:59"
+                date_time_modified="2006-11-14 11:14:57"
                 approved="0"
                 record_id="92">
          <umod:specificity hidden="1" site="N-term" position="Any N-term"
@@ -3390,12 +3324,6 @@
             <umod:element symbol="O" number="3"/>
             <umod:element symbol="S" number="1"/>
          </umod:delta>
-         <umod:alt_name>N-biotinyl-6-aminohexanoyl</umod:alt_name>
-         <umod:xref>
-            <umod:text>Patricelli et al. (2007). Functional Interrogation of the Kinome Using Nucleotide Acyl Phosphates. Biochemistry, 46, 350-358.</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://pubs.acs.org/doi/abs/10.1021/bi062142x</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>Introduction to Protein Labeling</umod:text>
             <umod:source>Misc. URL</umod:source>
@@ -3976,19 +3904,17 @@
             <umod:element symbol="S" number="3"/>
          </umod:delta>
       </umod:mod>
-      <umod:mod title="GG" full_name="ubiquitinylation residue" username_of_poster="gielbert"
+      <umod:mod title="GlyGly" full_name="ubiquitinylation residue"
+                username_of_poster="gielbert"
                 group_of_poster="users"
                 date_time_posted="2003-04-30 13:32:37"
-                date_time_modified="2017-03-06 08:47:05"
+                date_time_modified="2008-04-21 18:24:57"
                 approved="1"
                 record_id="121">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="4"/>
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="Other" spec_group="3"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other" spec_group="2"/>
+         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other" spec_group="4"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Post-translational"
-                           spec_group="5"/>
          <umod:delta mono_mass="114.042927" avge_mass="114.1026" composition="H(6) C(4) N(2) O(2)">
             <umod:element symbol="H" number="6"/>
             <umod:element symbol="C" number="4"/>
@@ -4016,11 +3942,6 @@
             <umod:source>Misc. URL</umod:source>
             <umod:url>http://www.nottingham.ac.uk/biochemcourses/students/ub/ubindex.html</umod:url>
          </umod:xref>
-         <umod:xref>
-            <umod:text>15055197</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
          <umod:misc_notes>The two glycine residues left on ubiquitinylated lysine after tryptic digestion</umod:misc_notes>
       </umod:mod>
       <umod:mod title="Formyl" full_name="Formylation" username_of_poster="pnacman"
@@ -4213,20 +4134,19 @@
          </umod:xref>
          <umod:misc_notes>Reduced product of reaction with 3,3-Dithio-bis-(sulfosuccinimidyl)propionate. Note that name thioacyl is misleading and subject to change in a future revision. Can also be the product of reaction with EZ-Link Sulfo-NHS-SS-Biotin (Sulfosuccinimidyl 2-(biotinamido)-ethyl-1, 3-dithiopropionate) followed by reduction with DTT</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="Fluoro" full_name="fluorination" username_of_poster="jschulte"
+      <umod:mod title="Fluoro" full_name="fluorophenylalanine replacement of phenylalanine"
+                username_of_poster="jschulte"
                 group_of_poster="users"
                 date_time_posted="2003-06-19 19:54:25"
-                date_time_modified="2012-11-20 11:56:44"
+                date_time_modified="2007-07-08 18:42:53"
                 approved="1"
                 record_id="127">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Non-standard residue"
-                           spec_group="3"/>
          <umod:specificity hidden="1" site="W" position="Anywhere" classification="Non-standard residue"
                            spec_group="2"/>
          <umod:specificity hidden="1" site="F" position="Anywhere" classification="Non-standard residue"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="A" position="Anywhere" classification="Chemical derivative"
-                           spec_group="4"/>
+         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Non-standard residue"
+                           spec_group="3"/>
          <umod:delta mono_mass="17.990578" avge_mass="17.9905" composition="H(-1) F">
             <umod:element symbol="H" number="-1"/>
             <umod:element symbol="F" number="1"/>
@@ -4236,11 +4156,6 @@
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Journal of Drug Targeting (1993), 1(3), 259-67.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url/>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Fluorescein"
                 full_name="5-Iodoacetamidofluorescein (Molecular Probe, Eugene, OR)"
@@ -4465,20 +4380,11 @@
                 username_of_poster="tpjd2"
                 group_of_poster="users"
                 date_time_posted="2003-08-06 11:31:37"
-                date_time_modified="2015-05-01 15:44:36"
+                date_time_modified="2006-10-16 17:22:04"
                 approved="1"
                 record_id="137">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1216.422863" avge_mass="1217.0880" flag="false"
-                              composition="Hex(5) HexNAc(2)">
-               <umod:element symbol="H" number="76"/>
-               <umod:element symbol="C" number="46"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="35"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="1216.422863" avge_mass="1217.0880" composition="Hex(5) HexNAc(2)">
             <umod:element symbol="H" number="76"/>
             <umod:element symbol="C" number="46"/>
@@ -4581,42 +4487,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="HexNAc(1)dHex(1)" full_name="HexNAc1dHex1" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:28:45"
-                date_time_modified="2015-05-05 10:49:49"
+                date_time_modified="2006-10-16 16:03:39"
                 approved="1"
                 record_id="142">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="349.137281" avge_mass="349.3337" flag="false"
-                              composition="dHex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="349.137281" avge_mass="349.3337" flag="false"
-                              composition="dHex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="349.137281" avge_mass="349.3337" flag="false"
-                              composition="dHex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="349.137281" avge_mass="349.3337" composition="dHex HexNAc">
             <umod:element symbol="H" number="23"/>
             <umod:element symbol="C" number="14"/>
@@ -4627,42 +4502,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="HexNAc(2)" full_name="HexNAc2" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:37:55"
-                date_time_modified="2015-05-05 10:50:08"
+                date_time_modified="2006-10-16 16:43:09"
                 approved="1"
                 record_id="143">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="406.158745" avge_mass="406.3850" flag="false"
-                              composition="HexNAc(2)">
-               <umod:element symbol="H" number="26"/>
-               <umod:element symbol="C" number="16"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="10"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="406.158745" avge_mass="406.3850" flag="false"
-                              composition="HexNAc(2)">
-               <umod:element symbol="H" number="26"/>
-               <umod:element symbol="C" number="16"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="10"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="406.158745" avge_mass="406.3850" flag="false"
-                              composition="HexNAc(2)">
-               <umod:element symbol="H" number="26"/>
-               <umod:element symbol="C" number="16"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="10"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="406.158745" avge_mass="406.3850" composition="HexNAc(2)">
             <umod:element symbol="H" number="26"/>
             <umod:element symbol="C" number="16"/>
@@ -4673,36 +4517,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Hex(3)" full_name="Hex3" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:39:30"
-                date_time_modified="2015-05-05 10:52:04"
+                date_time_modified="2006-10-16 16:59:36"
                 approved="1"
                 record_id="144">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="486.158471" avge_mass="486.4218" flag="false" composition="Hex(3)">
-               <umod:element symbol="H" number="30"/>
-               <umod:element symbol="C" number="18"/>
-               <umod:element symbol="O" number="15"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="486.158471" avge_mass="486.4218" flag="false" composition="Hex(3)">
-               <umod:element symbol="H" number="30"/>
-               <umod:element symbol="C" number="18"/>
-               <umod:element symbol="O" number="15"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="486.158471" avge_mass="486.4218" flag="false" composition="Hex(3)">
-               <umod:element symbol="H" number="30"/>
-               <umod:element symbol="C" number="18"/>
-               <umod:element symbol="O" number="15"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="486.158471" avge_mass="486.4218" composition="Hex(3)">
             <umod:element symbol="H" number="30"/>
             <umod:element symbol="C" number="18"/>
@@ -4712,20 +4531,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="HexNAc(1)dHex(2)" full_name="HexNAc1dHex2" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:40:57"
-                date_time_modified="2015-05-01 15:19:51"
+                date_time_modified="2006-10-16 17:01:52"
                 approved="1"
                 record_id="145">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="495.195190" avge_mass="495.4749" flag="false"
-                              composition="dHex(2) HexNAc">
-               <umod:element symbol="H" number="33"/>
-               <umod:element symbol="C" number="20"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="13"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="495.195190" avge_mass="495.4749" composition="dHex(2) HexNAc">
             <umod:element symbol="H" number="33"/>
             <umod:element symbol="C" number="20"/>
@@ -4737,42 +4547,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:42:27"
-                date_time_modified="2015-05-05 10:52:59"
+                date_time_modified="2006-10-16 17:02:06"
                 approved="1"
                 record_id="146">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="511.190105" avge_mass="511.4743" flag="false"
-                              composition="dHex Hex HexNAc">
-               <umod:element symbol="H" number="33"/>
-               <umod:element symbol="C" number="20"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="14"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="511.190105" avge_mass="511.4743" flag="false"
-                              composition="dHex Hex HexNAc">
-               <umod:element symbol="H" number="33"/>
-               <umod:element symbol="C" number="20"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="14"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="511.190105" avge_mass="511.4743" flag="false"
-                              composition="dHex Hex HexNAc">
-               <umod:element symbol="H" number="33"/>
-               <umod:element symbol="C" number="20"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="14"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="511.190105" avge_mass="511.4743" composition="dHex Hex HexNAc">
             <umod:element symbol="H" number="33"/>
             <umod:element symbol="C" number="20"/>
@@ -4783,20 +4562,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="HexNAc(2)dHex(1)" full_name="HexNAc2dHex1" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:44:18"
-                date_time_modified="2015-05-01 15:23:32"
+                date_time_modified="2006-10-16 17:04:11"
                 approved="1"
                 record_id="147">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="552.216654" avge_mass="552.5262" flag="false"
-                              composition="dHex HexNAc(2)">
-               <umod:element symbol="H" number="36"/>
-               <umod:element symbol="C" number="22"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="14"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="552.216654" avge_mass="552.5262" composition="dHex HexNAc(2)">
             <umod:element symbol="H" number="36"/>
             <umod:element symbol="C" number="22"/>
@@ -4807,42 +4577,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Hex(1)HexNAc(2)" full_name="Hex1HexNAc2" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:48:18"
-                date_time_modified="2015-05-05 10:46:08"
+                date_time_modified="2006-10-16 17:04:35"
                 approved="1"
                 record_id="148">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="568.211569" avge_mass="568.5256" flag="false"
-                              composition="Hex HexNAc(2)">
-               <umod:element symbol="H" number="36"/>
-               <umod:element symbol="C" number="22"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="15"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="568.211569" avge_mass="568.5256" flag="false"
-                              composition="Hex HexNAc(2)">
-               <umod:element symbol="H" number="36"/>
-               <umod:element symbol="C" number="22"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="15"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="568.211569" avge_mass="568.5256" flag="false"
-                              composition="Hex HexNAc(2)">
-               <umod:element symbol="H" number="36"/>
-               <umod:element symbol="C" number="22"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="15"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="568.211569" avge_mass="568.5256" composition="Hex HexNAc(2)">
             <umod:element symbol="H" number="36"/>
             <umod:element symbol="C" number="22"/>
@@ -4854,42 +4593,15 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:51:19"
-                date_time_modified="2015-05-01 15:25:10"
+                date_time_modified="2007-10-20 19:29:29"
                 approved="1"
                 record_id="149">
+         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
+                           spec_group="1"/>
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="656.227613" avge_mass="656.5877" flag="false"
-                              composition="Hex HexNAc NeuAc">
-               <umod:element symbol="H" number="40"/>
-               <umod:element symbol="C" number="25"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="18"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="3"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="656.227613" avge_mass="656.5877" flag="false"
-                              composition="Hex HexNAc NeuAc">
-               <umod:element symbol="H" number="40"/>
-               <umod:element symbol="C" number="25"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="18"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="656.227613" avge_mass="656.5877" flag="false"
-                              composition="Hex HexNAc NeuAc">
-               <umod:element symbol="H" number="40"/>
-               <umod:element symbol="C" number="25"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="18"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="2"/>
          <umod:delta mono_mass="656.227613" avge_mass="656.5877" composition="Hex HexNAc NeuAc">
             <umod:element symbol="H" number="40"/>
             <umod:element symbol="C" number="25"/>
@@ -4905,20 +4617,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="HexNAc(2)dHex(2)" full_name="HexNAc2dHex2" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:52:36"
-                date_time_modified="2015-05-01 15:25:48"
+                date_time_modified="2006-10-16 17:11:45"
                 approved="1"
                 record_id="150">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="698.274563" avge_mass="698.6674" flag="false"
-                              composition="dHex(2) HexNAc(2)">
-               <umod:element symbol="H" number="46"/>
-               <umod:element symbol="C" number="28"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="18"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="698.274563" avge_mass="698.6674" composition="dHex(2) HexNAc(2)">
             <umod:element symbol="H" number="46"/>
             <umod:element symbol="C" number="28"/>
@@ -4930,20 +4633,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:53:29"
-                date_time_modified="2015-05-01 15:26:17"
+                date_time_modified="2006-10-16 17:12:02"
                 approved="1"
                 record_id="151">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="700.253828" avge_mass="700.6403" flag="false"
-                              composition="Pent Hex HexNAc(2)">
-               <umod:element symbol="H" number="44"/>
-               <umod:element symbol="C" number="27"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="19"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="700.253828" avge_mass="700.6403" composition="Pent Hex HexNAc(2)">
             <umod:element symbol="H" number="44"/>
             <umod:element symbol="C" number="27"/>
@@ -4955,42 +4649,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:54:18"
-                date_time_modified="2015-05-05 16:20:33"
+                date_time_modified="2006-10-16 17:12:59"
                 approved="1"
                 record_id="152">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="714.269478" avge_mass="714.6668" flag="false"
-                              composition="dHex Hex HexNAc(2)">
-               <umod:element symbol="H" number="46"/>
-               <umod:element symbol="C" number="28"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="19"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="714.269478" avge_mass="714.6668" flag="false"
-                              composition="dHex Hex HexNAc(2)">
-               <umod:element symbol="H" number="46"/>
-               <umod:element symbol="C" number="28"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="19"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="714.269478" avge_mass="714.6668" flag="false"
-                              composition="dHex Hex HexNAc(2)">
-               <umod:element symbol="H" number="46"/>
-               <umod:element symbol="C" number="28"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="19"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="714.269478" avge_mass="714.6668" composition="dHex Hex HexNAc(2)">
             <umod:element symbol="H" number="46"/>
             <umod:element symbol="C" number="28"/>
@@ -5001,42 +4664,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Hex(2)HexNAc(2)" full_name="Hex2HexNAc2" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:55:08"
-                date_time_modified="2015-05-05 16:22:13"
+                date_time_modified="2006-10-16 17:13:17"
                 approved="1"
                 record_id="153">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="730.264392" avge_mass="730.6662" flag="false"
-                              composition="Hex(2) HexNAc(2)">
-               <umod:element symbol="H" number="46"/>
-               <umod:element symbol="C" number="28"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="20"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="730.264392" avge_mass="730.6662" flag="false"
-                              composition="Hex(2) HexNAc(2)">
-               <umod:element symbol="H" number="46"/>
-               <umod:element symbol="C" number="28"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="20"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="730.264392" avge_mass="730.6662" flag="false"
-                              composition="Hex(2) HexNAc(2)">
-               <umod:element symbol="H" number="46"/>
-               <umod:element symbol="C" number="28"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="20"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="730.264392" avge_mass="730.6662" composition="Hex(2) HexNAc(2)">
             <umod:element symbol="H" number="46"/>
             <umod:element symbol="C" number="28"/>
@@ -5048,20 +4680,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:56:02"
-                date_time_modified="2015-05-01 15:29:31"
+                date_time_modified="2006-10-16 17:18:03"
                 approved="1"
                 record_id="154">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="821.280102" avge_mass="821.7289" flag="false"
-                              composition="Pent Hex(3) HexNAc">
-               <umod:element symbol="H" number="51"/>
-               <umod:element symbol="C" number="31"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="24"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="821.280102" avge_mass="821.7289" composition="Pent Hex(3) HexNAc">
             <umod:element symbol="H" number="51"/>
             <umod:element symbol="C" number="31"/>
@@ -5073,20 +4696,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:57:01"
-                date_time_modified="2015-05-01 15:29:55"
+                date_time_modified="2006-10-16 17:18:41"
                 approved="1"
                 record_id="155">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="846.311736" avge_mass="846.7815" flag="false"
-                              composition="Pent dHex Hex HexNAc(2)">
-               <umod:element symbol="H" number="54"/>
-               <umod:element symbol="C" number="33"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="23"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="846.311736" avge_mass="846.7815"
                      composition="Pent dHex Hex HexNAc(2)">
             <umod:element symbol="H" number="54"/>
@@ -5099,42 +4713,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:57:52"
-                date_time_modified="2015-05-05 16:24:22"
+                date_time_modified="2006-10-16 17:18:56"
                 approved="1"
                 record_id="156">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="860.327386" avge_mass="860.8080" flag="false"
-                              composition="dHex(2) Hex HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="23"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="860.327386" avge_mass="860.8080" flag="false"
-                              composition="dHex(2) Hex HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="23"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="860.327386" avge_mass="860.8080" flag="false"
-                              composition="dHex(2) Hex HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="23"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="860.327386" avge_mass="860.8080" composition="dHex(2) Hex HexNAc(2)">
             <umod:element symbol="H" number="56"/>
             <umod:element symbol="C" number="34"/>
@@ -5146,20 +4729,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:58:38"
-                date_time_modified="2015-05-01 15:30:54"
+                date_time_modified="2006-10-16 17:19:11"
                 approved="1"
                 record_id="157">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="862.306651" avge_mass="862.7809" flag="false"
-                              composition="Pent Hex(2) HexNAc(2)">
-               <umod:element symbol="H" number="54"/>
-               <umod:element symbol="C" number="33"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="24"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="862.306651" avge_mass="862.7809" composition="Pent Hex(2) HexNAc(2)">
             <umod:element symbol="H" number="54"/>
             <umod:element symbol="C" number="33"/>
@@ -5171,42 +4745,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:59:18"
-                date_time_modified="2015-05-05 16:26:14"
+                date_time_modified="2006-10-16 17:19:27"
                 approved="1"
                 record_id="158">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="876.322301" avge_mass="876.8074" flag="false"
-                              composition="dHex Hex(2) HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="24"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="876.322301" avge_mass="876.8074" flag="false"
-                              composition="dHex Hex(2) HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="24"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="876.322301" avge_mass="876.8074" flag="false"
-                              composition="dHex Hex(2) HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="24"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="876.322301" avge_mass="876.8074" composition="dHex Hex(2) HexNAc(2)">
             <umod:element symbol="H" number="56"/>
             <umod:element symbol="C" number="34"/>
@@ -5217,42 +4760,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Hex(3)HexNAc(2)" full_name="Hex3HexNAc2" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 12:59:59"
-                date_time_modified="2015-05-05 16:27:36"
+                date_time_modified="2006-10-16 17:19:58"
                 approved="1"
                 record_id="159">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="892.317216" avge_mass="892.8068" flag="false"
-                              composition="Hex(3) HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="25"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="892.317216" avge_mass="892.8068" flag="false"
-                              composition="Hex(3) HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="25"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="892.317216" avge_mass="892.8068" flag="false"
-                              composition="Hex(3) HexNAc(2)">
-               <umod:element symbol="H" number="56"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="25"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="892.317216" avge_mass="892.8068" composition="Hex(3) HexNAc(2)">
             <umod:element symbol="H" number="56"/>
             <umod:element symbol="C" number="34"/>
@@ -5265,42 +4777,15 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 13:01:06"
-                date_time_modified="2015-05-01 15:42:42"
+                date_time_modified="2007-10-20 19:30:21"
                 approved="1"
                 record_id="160">
+         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
+                           spec_group="1"/>
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="947.323029" avge_mass="947.8423" flag="false"
-                              composition="Hex HexNAc NeuAc(2)">
-               <umod:element symbol="H" number="57"/>
-               <umod:element symbol="C" number="36"/>
-               <umod:element symbol="N" number="3"/>
-               <umod:element symbol="O" number="26"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="3"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="947.323029" avge_mass="947.8423" flag="false"
-                              composition="Hex HexNAc NeuAc(2)">
-               <umod:element symbol="H" number="57"/>
-               <umod:element symbol="C" number="36"/>
-               <umod:element symbol="N" number="3"/>
-               <umod:element symbol="O" number="26"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="947.323029" avge_mass="947.8423" flag="false"
-                              composition="Hex HexNAc NeuAc(2)">
-               <umod:element symbol="H" number="57"/>
-               <umod:element symbol="C" number="36"/>
-               <umod:element symbol="N" number="3"/>
-               <umod:element symbol="O" number="26"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="2"/>
          <umod:delta mono_mass="947.323029" avge_mass="947.8423" composition="Hex HexNAc NeuAc(2)">
             <umod:element symbol="H" number="57"/>
             <umod:element symbol="C" number="36"/>
@@ -5313,31 +4798,20 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Hex(3)HexNAc(2)Phos(1)" full_name="Hex(3) HexNAc(2) Phos"
+      <umod:mod title="Hex(3)HexNAc(2)P(1)" full_name="Hex3HexNAc2P1"
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2003-09-29 13:02:02"
-                date_time_modified="2015-05-06 09:48:32"
+                date_time_modified="2006-10-16 17:20:48"
                 approved="1"
                 record_id="161">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="972.283547" avge_mass="972.7867" flag="false"
-                              composition="H O(3) P Hex(3) HexNAc(2)">
-               <umod:element symbol="H" number="57"/>
-               <umod:element symbol="C" number="34"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="28"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="972.283547" avge_mass="972.7867"
-                     composition="H O(3) P Hex(3) HexNAc(2)">
-            <umod:element symbol="H" number="57"/>
+                           spec_group="1"/>
+         <umod:delta mono_mass="923.290978" avge_mass="923.7806" composition="P Hex(3) HexNAc(2)">
+            <umod:element symbol="H" number="56"/>
             <umod:element symbol="C" number="34"/>
             <umod:element symbol="N" number="2"/>
-            <umod:element symbol="O" number="28"/>
+            <umod:element symbol="O" number="25"/>
             <umod:element symbol="P" number="1"/>
          </umod:delta>
       </umod:mod>
@@ -5396,19 +4870,15 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Methyl:2H(3)13C(1)" full_name="monomethylation"
+      <umod:mod title="Methyl:2H(3)13C(1)" full_name="monomethylated arginine"
                 username_of_poster="sams"
                 group_of_poster="users"
                 date_time_posted="2005-06-30 18:19:34"
-                date_time_modified="2016-06-14 11:54:23"
+                date_time_modified="2006-10-14 19:40:53"
                 approved="1"
                 record_id="329">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="2"/>
          <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="3"/>
          <umod:delta mono_mass="18.037835" avge_mass="18.0377" composition="H(-1) 2H(3) 13C">
             <umod:element symbol="H" number="-1"/>
             <umod:element symbol="2H" number="3"/>
@@ -5420,24 +4890,19 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Dimethyl:2H(6)13C(2)" full_name="dimethylation"
+      <umod:mod title="Dimethyl:2H(6)13C(2)" full_name="dimethylated arginine"
                 username_of_poster="sams"
                 group_of_poster="users"
                 date_time_posted="2005-06-30 18:21:32"
-                date_time_modified="2014-11-16 07:36:47"
+                date_time_modified="2011-07-18 11:27:58"
                 approved="1"
                 record_id="330">
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>When dimethyl labelling is pre-digest</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                            spec_group="2"/>
+         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
+                           spec_group="1"/>
+         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
+                           spec_group="3"/>
          <umod:delta mono_mass="36.075670" avge_mass="36.0754" composition="H(-2) 2H(6) 13C(2)">
             <umod:element symbol="H" number="-2"/>
             <umod:element symbol="2H" number="6"/>
@@ -5481,11 +4946,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Delta:H(1)N(-1)18O(1)" full_name="glycosylated asparagine 18O labeling"
+      <umod:mod title="Delta:H(1)O(-1)18O(1)" full_name="glycosylated asparagine 18O labeling"
                 username_of_poster="lobvi"
                 group_of_poster="users"
                 date_time_posted="2003-12-11 18:24:58"
-                date_time_modified="2014-05-21 08:59:48"
+                date_time_modified="2009-06-26 17:35:41"
                 approved="1"
                 record_id="170">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="Isotopic label"
@@ -5867,25 +5332,26 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Dimethyl:2H(4)" full_name="DiMethyl-CHD2" username_of_poster="PhilipHsu"
                 group_of_poster="users"
                 date_time_posted="2004-04-20 07:07:29"
-                date_time_modified="2014-11-16 07:35:30"
+                date_time_modified="2006-10-15 18:24:07"
                 approved="1"
                 record_id="199">
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Isotopic label"
-                           spec_group="3">
-            <umod:misc_notes>When dimethyl labelling is pre-digest</umod:misc_notes>
-         </umod:specificity>
+                           spec_group="3"/>
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                            spec_group="2"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="4"/>
          <umod:delta mono_mass="32.056407" avge_mass="32.0778" composition="2H(4) C(2)">
             <umod:element symbol="2H" number="4"/>
             <umod:element symbol="C" number="2"/>
          </umod:delta>
          <umod:alt_name>reductive amination</umod:alt_name>
+         <umod:xref>
+            <umod:text>Anal Chem 2003. 75, 6843</umod:text>
+            <umod:source>Journal</umod:source>
+            <umod:url/>
+         </umod:xref>
          <umod:xref>
             <umod:text>14670044</umod:text>
             <umod:source>PubMed PMID</umod:source>
@@ -5896,11 +5362,6 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:source>Book</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Anal Chem 2003. 75, 6843</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url/>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="EQAT" full_name="EAPTA d0" username_of_poster="s_julka"
                 group_of_poster="users"
@@ -6069,67 +5530,23 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="ionjockey"
                 group_of_poster="users"
                 date_time_posted="2004-05-27 20:53:37"
-                date_time_modified="2017-01-13 15:56:14"
+                date_time_modified="2011-10-20 13:50:11"
                 approved="1"
                 record_id="213">
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Other glycosylation"
-                           spec_group="7"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
-                           spec_group="6"/>
          <umod:specificity hidden="1" site="E" position="Anywhere" classification="Other glycosylation"
                            spec_group="5"/>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="4">
-            <umod:NeutralLoss mono_mass="541.061110" avge_mass="541.3005" flag="false"
-                              composition="H(13) C(10) N(5) O(9) P(2) Pent">
-               <umod:element symbol="H" number="21"/>
-               <umod:element symbol="C" number="15"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="2"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="4">
-            <umod:NeutralLoss mono_mass="541.061110" avge_mass="541.3005" flag="false"
-                              composition="H(13) C(10) N(5) O(9) P(2) Pent">
-               <umod:element symbol="H" number="21"/>
-               <umod:element symbol="C" number="15"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="2"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
+                           spec_group="4"/>
+         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Other glycosylation"
+                           spec_group="3"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other glycosylation"
                            spec_group="2"/>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="3">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="541.061110" avge_mass="541.3005" flag="false"
-                              composition="H(13) C(10) N(5) O(9) P(2) Pent">
-               <umod:element symbol="H" number="21"/>
-               <umod:element symbol="C" number="15"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="2"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="541.061110" avge_mass="541.3005" flag="false"
-                              composition="H(13) C(10) N(5) O(9) P(2) Pent">
-               <umod:element symbol="H" number="21"/>
-               <umod:element symbol="C" number="15"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="2"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other glycosylation"
+                           spec_group="1"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
+                           spec_group="6"/>
          <umod:delta mono_mass="541.061110" avge_mass="541.3005"
-                     composition="H(13) C(10) N(5) O(9) P(2) Pent">
+                     composition="H(21) C(15) N(5) O(13) P(2)">
             <umod:element symbol="H" number="21"/>
             <umod:element symbol="C" number="15"/>
             <umod:element symbol="N" number="5"/>
@@ -6137,19 +5554,14 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="P" number="2"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>Serine is a new target residue for endogenous ADP-ribosylation on histones, Nature Chemical Biology 12, 998–1000 (2016)</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://www.nature.com/nchembio/journal/v12/n12/full/nchembio.2180.html</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>AA0237</umod:text>
+            <umod:text>AA0231</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>P-T modification of Lysine</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1093/nar/gkq463</umod:url>
+            <umod:text>AA0168</umod:text>
+            <umod:source>RESID</umod:source>
+            <umod:url/>
          </umod:xref>
          <umod:xref>
             <umod:text>Structure</umod:text>
@@ -6157,17 +5569,12 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url>http://betelgeuse.u-strasbg.fr/DocPARP/DocPARG/images/Structure-pADPR.jpg</umod:url>
          </umod:xref>
          <umod:xref>
-            <umod:text>Identification of the ADP-ribosylation sites in the PARP-1 automodification domain: analysis and implications</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1021/ja906135d</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>ADP</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0169</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0168</umod:text>
+            <umod:text>AA0237</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -6177,24 +5584,19 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0231</umod:text>
+            <umod:text>AA0295</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0169</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>ADP</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>Mapping PARP-1 auto-ADP-ribosylation sites by liquid chromatography-tandem mass spectrometry</umod:text>
+            <umod:text>P-T modification of Lysine</umod:text>
             <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1021/pr301219h</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>AA0295</umod:text>
-            <umod:source>RESID</umod:source>
-            <umod:url/>
+            <umod:url>http://dx.doi.org/10.1093/nar/gkq463</umod:url>
          </umod:xref>
       </umod:mod>
       <umod:mod title="NEIAA" full_name="N-ethyl iodoacetamide-d0" username_of_poster="Botting"
@@ -6436,13 +5838,15 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="hs01"
                 group_of_poster="users"
                 date_time_posted="2004-08-30 16:23:02"
-                date_time_modified="2014-06-09 09:40:49"
+                date_time_modified="2011-11-21 14:49:27"
                 approved="1"
                 record_id="259">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                            spec_group="1">
             <umod:misc_notes>Used in SILAC experiment</umod:misc_notes>
          </umod:specificity>
+         <umod:specificity hidden="1" site="L" position="Anywhere" classification="Isotopic label"
+                           spec_group="2"/>
          <umod:delta mono_mass="8.014199" avge_mass="7.9427" composition="C(-6) 13C(6) N(-2) 15N(2)">
             <umod:element symbol="C" number="-6"/>
             <umod:element symbol="13C" number="6"/>
@@ -6450,16 +5854,16 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="15N" number="2"/>
          </umod:delta>
          <umod:alt_name>heavy lysine</umod:alt_name>
-         <umod:xref>
-            <umod:text>12716131</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
          <umod:xref>
             <umod:text>Silac introduction</umod:text>
             <umod:source>Misc. URL</umod:source>
             <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
          </umod:xref>
+         <umod:xref>
+            <umod:text>12716131</umod:text>
+            <umod:source>PubMed PMID</umod:source>
+            <umod:url/>
+         </umod:xref>
       </umod:mod>
       <umod:mod title="Thiophospho" full_name="Thiophosphorylation"
                 username_of_poster="mrbladergroen"
@@ -6690,15 +6094,13 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Label:2H(3)" full_name="Trideuteration" username_of_poster="mmolloy"
                 group_of_poster="users"
                 date_time_posted="2004-09-29 08:52:01"
-                date_time_modified="2013-02-22 12:42:11"
+                date_time_modified="2006-10-14 09:38:54"
                 approved="1"
                 record_id="262">
          <umod:specificity hidden="1" site="L" position="Anywhere" classification="Isotopic label"
                            spec_group="1">
             <umod:misc_notes>for SILAC expt</umod:misc_notes>
          </umod:specificity>
-         <umod:specificity hidden="1" site="M" position="Anywhere" classification="Isotopic label"
-                           spec_group="2"/>
          <umod:delta mono_mass="3.018830" avge_mass="3.0185" composition="H(-3) 2H(3)">
             <umod:element symbol="H" number="-3"/>
             <umod:element symbol="2H" number="3"/>
@@ -6998,12 +6400,9 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Ethyl" full_name="Ethylation" username_of_poster="Qishanl"
                 group_of_poster="users"
                 date_time_posted="2005-01-27 23:18:07"
-                date_time_modified="2015-08-26 14:42:10"
+                date_time_modified="2009-10-02 18:28:37"
                 approved="1"
                 record_id="280">
-         <umod:specificity hidden="1" site="C-term" position="Any C-term"
-                           classification="Chemical derivative"
-                           spec_group="5"/>
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Chemical derivative"
                            spec_group="4"/>
@@ -7013,6 +6412,9 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                            spec_group="2"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Multiple"
                            spec_group="1"/>
+         <umod:specificity hidden="1" site="C-term" position="Any C-term"
+                           classification="Chemical derivative"
+                           spec_group="5"/>
          <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
                            spec_group="6"/>
          <umod:delta mono_mass="28.031300" avge_mass="28.0532" composition="H(4) C(2)">
@@ -7029,11 +6431,6 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:source>Journal</umod:source>
             <umod:url>http://pubs.acs.org/doi/abs/10.1021/ac0481250</umod:url>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Identification of Four Novel Types of in Vitro Protein Modifications</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2911956&amp;tool=pmcentrez&amp;rendertype=abstract</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="CoenzymeA" full_name="Cysteine modified Coenzyme A"
                 username_of_poster="tremis"
@@ -7121,13 +6518,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="Glebivanov"
                 group_of_poster="users"
                 date_time_posted="2005-02-13 01:26:38"
-                date_time_modified="2016-06-14 11:53:24"
+                date_time_modified="2006-10-14 19:35:54"
                 approved="1"
                 record_id="284">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="2"/>
          <umod:delta mono_mass="16.028204" avge_mass="16.0389" composition="2H(2) C">
             <umod:element symbol="2H" number="2"/>
             <umod:element symbol="C" number="1"/>
@@ -7298,11 +6693,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="IodoU-AMP" full_name="(Iodo)-uracil MP"
+      <umod:mod title="IodoU-AMP" full_name="Cross-link of (Iodo)-uracil MP with W,F,Y"
                 username_of_poster="davidERICanderson"
                 group_of_poster="users"
                 date_time_posted="2005-03-04 22:57:55"
-                date_time_modified="2017-01-31 13:36:23"
+                date_time_modified="2006-10-16 15:53:06"
                 approved="1"
                 record_id="292">
          <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
@@ -7325,9 +6720,9 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="O" number="9"/>
             <umod:element symbol="P" number="1"/>
          </umod:delta>
-         <umod:alt_name>UV induced linkage of Iodo-U-amp with WFY</umod:alt_name>
+         <umod:alt_name>UV induced cross-link product of Iodo-U-amp with WFY</umod:alt_name>
          <umod:xref>
-            <umod:text>11567090</umod:text>
+            <umod:text>6540775</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -7337,7 +6732,7 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>6540775</umod:text>
+            <umod:text>11567090</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -7405,36 +6800,15 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="dHex" full_name="Fucose" username_of_poster="rsack"
                 group_of_poster="users"
                 date_time_posted="2005-03-22 16:57:00"
-                date_time_modified="2015-05-01 15:01:02"
+                date_time_modified="2011-11-21 13:16:16"
                 approved="1"
                 record_id="295">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="146.057909" avge_mass="146.1412" flag="false" composition="dHex">
-               <umod:element symbol="H" number="10"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="146.057909" avge_mass="146.1412" flag="false" composition="dHex">
-               <umod:element symbol="H" number="10"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="2"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="146.057909" avge_mass="146.1412" flag="false" composition="dHex">
-               <umod:element symbol="H" number="10"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
+         <umod:specificity hidden="1" site="N" position="Anywhere" classification="O-linked glycosylation"
+                           spec_group="3"/>
          <umod:delta mono_mass="146.057909" avge_mass="146.1412" composition="dHex">
             <umod:element symbol="H" number="10"/>
             <umod:element symbol="C" number="6"/>
@@ -7461,39 +6835,21 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="ndacoyas"
                 group_of_poster="users"
                 date_time_posted="2005-03-24 16:31:28"
-                date_time_modified="2013-02-07 16:43:18"
+                date_time_modified="2006-10-14 19:36:59"
                 approved="1"
                 record_id="298">
-         <umod:specificity hidden="1" site="C-term" position="Anywhere" classification="Isotopic label"
-                           spec_group="1">
-            <umod:misc_notes>esterification of carboxylic acids using D3-Methanolic HCl</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Isotopic label"
-                           spec_group="2">
-            <umod:misc_notes>esterification of carboxylic acids using D3-Methanolic HCl</umod:misc_notes>
-         </umod:specificity>
          <umod:specificity hidden="1" site="E" position="Anywhere" classification="Isotopic label"
-                           spec_group="3">
-            <umod:misc_notes>esterification of carboxylic acids using D3-Methanolic HCl</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>SILAC labelling with L-Methionine-(methyl-d3)</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="5">
-            <umod:misc_notes>SILAC labelling with L-Methionine-(methyl-d3)</umod:misc_notes>
-         </umod:specificity>
+                           spec_group="3"/>
+         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Isotopic label"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="C-term" position="Anywhere" classification="Isotopic label"
+                           spec_group="1"/>
          <umod:delta mono_mass="17.034480" avge_mass="17.0451" composition="H(-1) 2H(3) C">
             <umod:element symbol="H" number="-1"/>
             <umod:element symbol="2H" number="3"/>
             <umod:element symbol="C" number="1"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>SILAC overview</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.sigmaaldrich.com/technical-documents/articles/stable-isotopes/stable-isotope-labeling-by-amino-acids.html</umod:url>
-         </umod:xref>
+         <umod:misc_notes>esterification of carboxylic acids using D3-Methanolic HCl</umod:misc_notes>
       </umod:mod>
       <umod:mod title="Carboxy" full_name="Carboxylation" username_of_poster="Carol"
                 group_of_poster="users"
@@ -7622,42 +6978,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="whaskins"
                 group_of_poster="users"
                 date_time_posted="2005-04-25 18:20:12"
-                date_time_modified="2015-05-05 16:10:19"
+                date_time_modified="2006-10-16 17:22:46"
                 approved="1"
                 record_id="305">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1444.533870" avge_mass="1445.3331" flag="false"
-                              composition="dHex Hex(3) HexNAc(4)">
-               <umod:element symbol="H" number="92"/>
-               <umod:element symbol="C" number="56"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="39"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="1444.533870" avge_mass="1445.3331" flag="false"
-                              composition="dHex Hex(3) HexNAc(4)">
-               <umod:element symbol="H" number="92"/>
-               <umod:element symbol="C" number="56"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="39"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1444.533870" avge_mass="1445.3331" flag="false"
-                              composition="dHex Hex(3) HexNAc(4)">
-               <umod:element symbol="H" number="92"/>
-               <umod:element symbol="C" number="56"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="39"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="1444.533870" avge_mass="1445.3331"
                      composition="dHex Hex(3) HexNAc(4)">
             <umod:element symbol="H" number="92"/>
@@ -7671,42 +6996,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="whaskins"
                 group_of_poster="users"
                 date_time_posted="2005-04-25 19:22:11"
-                date_time_modified="2015-05-05 16:13:42"
+                date_time_modified="2006-10-16 17:23:48"
                 approved="1"
                 record_id="307">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1606.586693" avge_mass="1607.4737" flag="false"
-                              composition="dHex Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="102"/>
-               <umod:element symbol="C" number="62"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="44"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="1606.586693" avge_mass="1607.4737" flag="false"
-                              composition="dHex Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="102"/>
-               <umod:element symbol="C" number="62"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="44"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1606.586693" avge_mass="1607.4737" flag="false"
-                              composition="dHex Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="102"/>
-               <umod:element symbol="C" number="62"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="44"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="1606.586693" avge_mass="1607.4737"
                      composition="dHex Hex(4) HexNAc(4)">
             <umod:element symbol="H" number="102"/>
@@ -7719,20 +7013,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="whaskins"
                 group_of_poster="users"
                 date_time_posted="2005-04-25 19:25:17"
-                date_time_modified="2015-05-01 15:47:21"
+                date_time_modified="2006-10-16 17:24:49"
                 approved="1"
                 record_id="308">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1768.639517" avge_mass="1769.6143" flag="false"
-                              composition="dHex Hex(5) HexNAc(4)">
-               <umod:element symbol="H" number="112"/>
-               <umod:element symbol="C" number="68"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="49"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="1768.639517" avge_mass="1769.6143"
                      composition="dHex Hex(5) HexNAc(4)">
             <umod:element symbol="H" number="112"/>
@@ -7745,42 +7030,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="whaskins"
                 group_of_poster="users"
                 date_time_posted="2005-04-25 19:27:51"
-                date_time_modified="2015-05-05 16:07:54"
+                date_time_modified="2006-10-16 17:22:29"
                 approved="1"
                 record_id="309">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1298.475961" avge_mass="1299.1919" flag="false"
-                              composition="Hex(3) HexNAc(4)">
-               <umod:element symbol="H" number="82"/>
-               <umod:element symbol="C" number="50"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="35"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1298.475961" avge_mass="1299.1919" flag="false"
-                              composition="Hex(3) HexNAc(4)">
-               <umod:element symbol="H" number="82"/>
-               <umod:element symbol="C" number="50"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="35"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="1298.475961" avge_mass="1299.1919" flag="false"
-                              composition="Hex(3) HexNAc(4)">
-               <umod:element symbol="H" number="82"/>
-               <umod:element symbol="C" number="50"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="35"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="1298.475961" avge_mass="1299.1919" composition="Hex(3) HexNAc(4)">
             <umod:element symbol="H" number="82"/>
             <umod:element symbol="C" number="50"/>
@@ -7792,42 +7046,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="whaskins"
                 group_of_poster="users"
                 date_time_posted="2005-04-25 19:33:37"
-                date_time_modified="2015-05-05 16:11:54"
+                date_time_modified="2006-10-16 17:23:05"
                 approved="1"
                 record_id="310">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1460.528784" avge_mass="1461.3325" flag="false"
-                              composition="Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="92"/>
-               <umod:element symbol="C" number="56"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="40"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="1460.528784" avge_mass="1461.3325" flag="false"
-                              composition="Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="92"/>
-               <umod:element symbol="C" number="56"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="40"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="1460.528784" avge_mass="1461.3325" flag="false"
-                              composition="Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="92"/>
-               <umod:element symbol="C" number="56"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="40"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="1460.528784" avge_mass="1461.3325" composition="Hex(4) HexNAc(4)">
             <umod:element symbol="H" number="92"/>
             <umod:element symbol="C" number="56"/>
@@ -7838,42 +7061,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Hex(5)HexNAc(4)" full_name="Biantennary" username_of_poster="whaskins"
                 group_of_poster="users"
                 date_time_posted="2005-04-25 19:35:54"
-                date_time_modified="2015-07-03 16:59:05"
+                date_time_modified="2006-10-16 17:24:34"
                 approved="1"
                 record_id="311">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1622.581608" avge_mass="1623.4731" flag="false"
-                              composition="Hex(5) HexNAc(4)">
-               <umod:element symbol="H" number="102"/>
-               <umod:element symbol="C" number="62"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="45"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="1622.581608" avge_mass="1623.4731" flag="false"
-                              composition="Hex(5) HexNAc(4)">
-               <umod:element symbol="H" number="102"/>
-               <umod:element symbol="C" number="62"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="45"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="1622.581608" avge_mass="1623.4731" flag="false"
-                              composition="Hex(5) HexNAc(4)">
-               <umod:element symbol="H" number="102"/>
-               <umod:element symbol="C" number="62"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="45"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="1622.581608" avge_mass="1623.4731" composition="Hex(5) HexNAc(4)">
             <umod:element symbol="H" number="102"/>
             <umod:element symbol="C" number="62"/>
@@ -8088,41 +7280,34 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
          </umod:delta>
          <umod:misc_notes>Invitrogen X-link reagent</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="Xlink:DTBPc" full_name="dimethyl 3,3\'-dithiobispropionimidate"
+      <umod:mod title="DTBP" full_name="dimethyl 3,3\'-dithiobispropionimidate"
                 username_of_poster="takesin"
                 group_of_poster="users"
                 date_time_posted="2005-05-18 08:43:26"
-                date_time_modified="2017-03-10 16:18:08"
+                date_time_modified="2006-11-14 11:16:21"
                 approved="0"
                 record_id="324">
-         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2">
-            <umod:misc_notes>side reaction?</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3">
-            <umod:misc_notes>side reaction?</umod:misc_notes>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Chemical derivative"
                            spec_group="5"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                            spec_group="4"/>
+         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
+                           spec_group="3"/>
+         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
+                           spec_group="2"/>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1">
-            <umod:misc_notes>side reaction?</umod:misc_notes>
-         </umod:specificity>
+                           spec_group="1"/>
          <umod:delta mono_mass="87.014270" avge_mass="87.1435" composition="H(5) C(3) N S">
             <umod:element symbol="H" number="5"/>
             <umod:element symbol="C" number="3"/>
             <umod:element symbol="N" number="1"/>
             <umod:element symbol="S" number="1"/>
          </umod:delta>
-         <umod:alt_name>cleaved and reduced</umod:alt_name>
          <umod:xref>
             <umod:text>Pierce data sheet</umod:text>
             <umod:source>Misc. URL</umod:source>
-            <umod:url>http://tools.thermofisher.com/content/sfs/manuals/MAN0011314_ImidoesterCrsLnk_DMA_DMP_DMS_DTBP_UG.pdf</umod:url>
+            <umod:url>http://www.piercenet.com/files/0668ss5.pdf</umod:url>
          </umod:xref>
          <umod:xref>
             <umod:text>770170</umod:text>
@@ -8551,7 +7736,7 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2006-10-16 10:29:12"
-                date_time_modified="2015-03-19 09:33:03"
+                date_time_modified="2006-11-14 10:38:36"
                 approved="1"
                 record_id="531">
          <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Artefact"
@@ -8560,17 +7745,10 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                            spec_group="1"/>
          <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
-                           spec_group="3"/>
          <umod:delta mono_mass="61.921774" avge_mass="62.5381" composition="H(-1) Cu">
             <umod:element symbol="H" number="-1"/>
             <umod:element symbol="Cu" number="1"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>Superoxide dismutase [Cu-Zn]</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.uniprot.org/uniprot/P07509</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Dehydro" full_name="Half of a disulfide bridge"
                 username_of_poster="unimod"
@@ -8593,13 +7771,13 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Diphthamide" full_name="Diphthamide" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-06 23:21:29"
-                date_time_modified="2015-09-08 17:15:11"
+                date_time_modified="2006-10-16 13:43:13"
                 approved="1"
                 record_id="375">
          <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:delta mono_mass="142.110613" avge_mass="142.1989" composition="H(14) C(7) N(2) O">
-            <umod:element symbol="H" number="14"/>
+         <umod:delta mono_mass="143.118438" avge_mass="143.2068" composition="H(15) C(7) N(2) O">
+            <umod:element symbol="H" number="15"/>
             <umod:element symbol="C" number="7"/>
             <umod:element symbol="N" number="2"/>
             <umod:element symbol="O" number="1"/>
@@ -8989,16 +8167,32 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-11 19:19:13"
-                date_time_modified="2015-05-01 14:08:37"
+                date_time_modified="2007-12-04 08:55:56"
                 approved="1"
                 record_id="393">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="O-linked glycosylation"
                            spec_group="1">
-            <umod:NeutralLoss mono_mass="340.100562" avge_mass="340.2806" flag="false" composition="O Hex(2)">
+            <umod:NeutralLoss mono_mass="324.105647" avge_mass="324.2812" flag="false" composition="Hex(2)">
                <umod:element symbol="H" number="20"/>
                <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="11"/>
+               <umod:element symbol="O" number="10"/>
+            </umod:NeutralLoss>
+            <umod:NeutralLoss mono_mass="162.052823" avge_mass="162.1406" flag="false" composition="Hex">
+               <umod:element symbol="H" number="10"/>
+               <umod:element symbol="C" number="6"/>
+               <umod:element symbol="O" number="5"/>
             </umod:NeutralLoss>
+            <umod:PepNeutralLoss mono_mass="324.105647" avge_mass="324.2812" required="false"
+                                 composition="Hex(2)">
+               <umod:element symbol="H" number="20"/>
+               <umod:element symbol="C" number="12"/>
+               <umod:element symbol="O" number="10"/>
+            </umod:PepNeutralLoss>
+            <umod:PepNeutralLoss mono_mass="162.052823" avge_mass="162.1406" required="false" composition="Hex">
+               <umod:element symbol="H" number="10"/>
+               <umod:element symbol="C" number="6"/>
+               <umod:element symbol="O" number="5"/>
+            </umod:PepNeutralLoss>
          </umod:specificity>
          <umod:delta mono_mass="340.100562" avge_mass="340.2806" composition="O Hex(2)">
             <umod:element symbol="H" number="20"/>
@@ -9342,10 +8536,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Phosphoadenosine" full_name="AMP" username_of_poster="unimod"
+      <umod:mod title="Phosphoadenosine" full_name="AMP binding site"
+                username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-11 21:34:01"
-                date_time_modified="2015-05-01 13:24:04"
+                date_time_modified="2006-10-16 15:53:49"
                 approved="1"
                 record_id="405">
          <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
@@ -9365,22 +8560,22 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="P" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>AA0267</umod:text>
+            <umod:text>AA0371</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0203</umod:text>
+            <umod:text>AA0227</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0227</umod:text>
+            <umod:text>AA0203</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0371</umod:text>
+            <umod:text>AA0267</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -9436,12 +8631,12 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-11 21:57:16"
-                date_time_modified="2015-05-01 13:14:26"
+                date_time_modified="2006-10-16 14:03:02"
                 approved="1"
                 record_id="408">
-         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Other glycosylation"
+         <umod:specificity hidden="1" site="P" position="Anywhere" classification="O-linked glycosylation"
                            spec_group="1"/>
-         <umod:delta mono_mass="148.037173" avge_mass="148.1140" composition="H(-2) C(-1) Hex">
+         <umod:delta mono_mass="148.037173" avge_mass="148.1140" composition="H(8) C(5) O(5)">
             <umod:element symbol="H" number="8"/>
             <umod:element symbol="C" number="5"/>
             <umod:element symbol="O" number="5"/>
@@ -9720,19 +8915,15 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Sulfide" full_name="persulfide" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-15 17:22:45"
-                date_time_modified="2012-11-23 11:25:27"
+                date_time_modified="2010-02-14 11:06:23"
                 approved="1"
                 record_id="421">
+         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
+                           spec_group="1"/>
          <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                            spec_group="2">
             <umod:misc_notes>beta-thiolation</umod:misc_notes>
          </umod:specificity>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3">
-            <umod:misc_notes>Addition of a single sulfur atom by Pi3-Tryptophan reagent to create thiol</umod:misc_notes>
-         </umod:specificity>
          <umod:delta mono_mass="31.972071" avge_mass="32.0650" composition="S">
             <umod:element symbol="S" number="1"/>
          </umod:delta>
@@ -9741,11 +8932,6 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Instruction manual for the Pi3 Tryptophan selective resins</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.nestgrp.com/protocols/bmt/pi3tr.shtml</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>CYSP</umod:text>
             <umod:source>FindMod</umod:source>
@@ -9810,15 +8996,13 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-15 17:53:48"
-                date_time_modified="2016-02-01 14:23:12"
+                date_time_modified="2006-10-17 11:44:28"
                 approved="1"
                 record_id="424">
          <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                            spec_group="2"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="U" position="Anywhere" classification="Post-translational"
-                           spec_group="3"/>
          <umod:delta mono_mass="1572.985775" avge_mass="1572.0146"
                      composition="H(47) C(40) N(20) O(26) P(4) S(4) Mo">
             <umod:element symbol="H" number="47"/>
@@ -9830,12 +9014,12 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="Mo" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>AA0375</umod:text>
+            <umod:text>AA0281</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0281</umod:text>
+            <umod:text>AA0375</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -9843,7 +9027,7 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Dioxidation" full_name="dihydroxy" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-15 17:59:33"
-                date_time_modified="2016-02-01 14:24:38"
+                date_time_modified="2006-10-15 18:19:52"
                 approved="1"
                 record_id="425">
          <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
@@ -9862,68 +9046,66 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                            spec_group="4">
             <umod:misc_notes>Sulphone</umod:misc_notes>
          </umod:specificity>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="3"/>
          <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
                            spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
+                           spec_group="3"/>
          <umod:specificity hidden="1" site="P" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                            spec_group="8">
             <umod:misc_notes>sulfinic acid</umod:misc_notes>
          </umod:specificity>
-         <umod:specificity hidden="1" site="U" position="Anywhere" classification="Multiple"
-                           spec_group="9"/>
          <umod:delta mono_mass="31.989829" avge_mass="31.9988" composition="O(2)">
             <umod:element symbol="O" number="2"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>AA0282</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>12686488</umod:text>
+            <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
-            <umod:source>Journal</umod:source>
+            <umod:text>AA0262</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>9252331</umod:text>
-            <umod:source>PubMed PMID</umod:source>
+            <umod:text>CSIA</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0251</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>MSONE</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0370</umod:text>
-            <umod:source>RESID</umod:source>
+            <umod:text>DIHYDR</umod:text>
+            <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>DIHYDR</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>9252331</umod:text>
+            <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>MSONE</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0251</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>CSIA</umod:text>
-            <umod:source>FindMod</umod:source>
+            <umod:text>AA0370</umod:text>
+            <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>12686488</umod:text>
-            <umod:source>PubMed PMID</umod:source>
+            <umod:text>Berlett, Barbara S.; Stadtman, Earl R. Journal of Biological Chemistry (1997), 272(33), 20313-20316.</umod:text>
+            <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0262</umod:text>
+            <umod:text>AA0282</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -9946,27 +9128,25 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Octanoyl" full_name="octanoyl" username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-15 18:04:46"
-                date_time_modified="2013-03-07 10:09:12"
+                date_time_modified="2006-10-16 13:38:44"
                 approved="1"
                 record_id="426">
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
                            spec_group="2"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
-                           spec_group="3"/>
          <umod:delta mono_mass="126.104465" avge_mass="126.1962" composition="H(14) C(8) O">
             <umod:element symbol="H" number="14"/>
             <umod:element symbol="C" number="8"/>
             <umod:element symbol="O" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>AA0290</umod:text>
+            <umod:text>AA0386</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>AA0386</umod:text>
+            <umod:text>AA0290</umod:text>
             <umod:source>RESID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -9975,43 +9155,18 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:source>FindMod</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>AA0584</umod:text>
-            <umod:source>RESID</umod:source>
-            <umod:url/>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="PhosphoHexNAc" full_name="N-acetylglucosamine-1-phosphoryl"
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-15 18:15:16"
-                date_time_modified="2015-05-01 15:11:15"
+                date_time_modified="2010-11-05 17:03:09"
                 approved="1"
                 record_id="428">
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
+                           spec_group="1"/>
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="283.045704" avge_mass="283.1724" flag="false"
-                              composition="H O(3) P HexNAc">
-               <umod:element symbol="H" number="14"/>
-               <umod:element symbol="C" number="8"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="8"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="283.045704" avge_mass="283.1724" flag="false"
-                              composition="H O(3) P HexNAc">
-               <umod:element symbol="H" number="14"/>
-               <umod:element symbol="C" number="8"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="8"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="2"/>
          <umod:delta mono_mass="283.045704" avge_mass="283.1724" composition="H O(3) P HexNAc">
             <umod:element symbol="H" number="14"/>
             <umod:element symbol="C" number="8"/>
@@ -10029,31 +9184,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="unimod"
                 group_of_poster="admin"
                 date_time_posted="2005-10-15 18:18:51"
-                date_time_modified="2015-05-01 15:09:57"
+                date_time_modified="2006-10-16 15:48:55"
                 approved="1"
                 record_id="429">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="242.019154" avge_mass="242.1205" flag="false"
-                              composition="H O(3) P Hex">
-               <umod:element symbol="H" number="11"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="8"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="242.019154" avge_mass="242.1205" flag="false"
-                              composition="H O(3) P Hex">
-               <umod:element symbol="H" number="11"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="O" number="8"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Other glycosylation"
+                           spec_group="1"/>
          <umod:delta mono_mass="242.019154" avge_mass="242.1205" composition="H O(3) P Hex">
             <umod:element symbol="H" number="11"/>
             <umod:element symbol="C" number="6"/>
@@ -10565,52 +9700,26 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="HexN" full_name="Hexosamine" username_of_poster="xyuan"
                 group_of_poster="users"
                 date_time_posted="2005-11-08 18:58:20"
-                date_time_modified="2015-05-01 16:57:37"
+                date_time_modified="2006-10-16 14:09:11"
                 approved="1"
                 record_id="454">
-         <umod:specificity hidden="1" site="W" position="Anywhere" classification="Other glycosylation"
+         <umod:specificity hidden="1" site="W" position="Anywhere" classification="N-linked glycosylation"
                            spec_group="4"/>
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="3">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="161.068808" avge_mass="161.1558" flag="false" composition="HexN">
-               <umod:element symbol="H" number="11"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="3">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="161.068808" avge_mass="161.1558" flag="false" composition="HexN">
-               <umod:element symbol="H" number="11"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
+                           spec_group="3"/>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="161.068808" avge_mass="161.1558" flag="false" composition="HexN">
-               <umod:element symbol="H" number="11"/>
-               <umod:element symbol="C" number="6"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="2"/>
          <umod:specificity hidden="1" site="K" position="Anywhere"
                            classification="Synth. pep. protect. gp."
                            spec_group="1"/>
-         <umod:delta mono_mass="161.068808" avge_mass="161.1558" composition="HexN">
+         <umod:delta mono_mass="161.068808" avge_mass="161.1558" composition="H(11) C(6) N O(4)">
             <umod:element symbol="H" number="11"/>
             <umod:element symbol="C" number="6"/>
             <umod:element symbol="N" number="1"/>
             <umod:element symbol="O" number="4"/>
          </umod:delta>
-         <umod:alt_name>Glucosamine</umod:alt_name>
          <umod:alt_name>Galactosamine</umod:alt_name>
+         <umod:alt_name>Glucosamine</umod:alt_name>
       </umod:mod>
       <umod:mod title="Xlink:DMP-s" full_name="One end of crosslink attached, one end free"
                 username_of_poster="mariana"
@@ -10923,41 +10032,20 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Hep" full_name="Heptose" username_of_poster="anikolakakis"
                 group_of_poster="users"
                 date_time_posted="2006-03-24 15:59:43"
-                date_time_modified="2015-05-05 15:58:34"
+                date_time_modified="2006-10-16 15:08:16"
                 approved="1"
                 record_id="490">
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="5">
-            <umod:NeutralLoss mono_mass="192.063388" avge_mass="192.1666" flag="false" composition="Hep">
-               <umod:element symbol="H" number="12"/>
-               <umod:element symbol="C" number="7"/>
-               <umod:element symbol="O" number="6"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="6"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="5">
-            <umod:NeutralLoss mono_mass="192.063388" avge_mass="192.1666" flag="false" composition="Hep">
-               <umod:element symbol="H" number="12"/>
-               <umod:element symbol="C" number="7"/>
-               <umod:element symbol="O" number="6"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="5"/>
          <umod:specificity hidden="1" site="R" position="Anywhere" classification="N-linked glycosylation"
                            spec_group="4"/>
-         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Other glycosylation"
+         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="N-linked glycosylation"
                            spec_group="3"/>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="192.063388" avge_mass="192.1666" flag="false" composition="Hep">
-               <umod:element symbol="H" number="12"/>
-               <umod:element symbol="C" number="7"/>
-               <umod:element symbol="O" number="6"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="N-linked glycosylation"
                            spec_group="1"/>
          <umod:delta mono_mass="192.063388" avge_mass="192.1666" composition="Hep">
             <umod:element symbol="H" number="12"/>
@@ -11255,20 +10343,13 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="oded"
                 group_of_poster="users"
                 date_time_posted="2006-05-08 22:03:41"
-                date_time_modified="2014-11-16 07:37:20"
+                date_time_modified="2006-10-15 18:26:15"
                 approved="1"
                 record_id="510">
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>When dimethyl labelling is pre-digest</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                            spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
+                           spec_group="1"/>
          <umod:delta mono_mass="34.063117" avge_mass="34.0631" composition="2H(4) 13C(2)">
             <umod:element symbol="2H" number="4"/>
             <umod:element symbol="13C" number="2"/>
@@ -11312,17 +10393,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="Hex(2)" full_name="Lactosylation" username_of_poster="molle"
                 group_of_poster="users"
                 date_time_posted="2006-05-11 13:21:17"
-                date_time_modified="2015-05-01 15:15:20"
+                date_time_modified="2006-10-17 13:44:30"
                 approved="0"
                 record_id="512">
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="N-linked glycosylation"
+         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Other glycosylation"
                            spec_group="2">
-            <umod:NeutralLoss mono_mass="324.105647" avge_mass="324.2812" flag="false" composition="Hex(2)">
-               <umod:element symbol="H" number="20"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="10"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
             <umod:misc_notes>Maillard reaction (first event)</umod:misc_notes>
          </umod:specificity>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
@@ -11336,12 +10411,12 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
          </umod:delta>
          <umod:alt_name>lac</umod:alt_name>
          <umod:xref>
-            <umod:text>BIOCHIMECAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS 236, 413-417 (1997)</umod:text>
+            <umod:text>ANALYTICAL BIOCHEMISTRY 259, 152-161 (1998)</umod:text>
             <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>ANALYTICAL BIOCHEMISTRY 259, 152-161 (1998)</umod:text>
+            <umod:text>BIOCHIMECAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS 236, 413-417 (1997)</umod:text>
             <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
@@ -11413,7 +10488,7 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="rbomgard"
                 group_of_poster=""
                 date_time_posted="2011-05-06 19:40:48"
-                date_time_modified="2015-04-20 16:24:29"
+                date_time_modified="2011-05-09 15:58:31"
                 approved="0"
                 record_id="1037">
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
@@ -11433,7 +10508,7 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
          <umod:xref>
             <umod:text>Serine Hydrolase Probes</umod:text>
             <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.lifetechnologies.com/order/catalog/product/88317</umod:url>
+            <umod:url>http://www.piercenet.com/browse.cfm?fldID=0842EF3A-D867-AEA2-6E77-E84116CAA87C</umod:url>
          </umod:xref>
          <umod:xref>
             <umod:text>Liu, Patricelli and Cravatt. (1999) Activity-based protein profiling: The serine hydrolases. Proc Natl Acad Sci USA 96:14694-14699</umod:text>
@@ -11592,10 +10667,10 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="mmacaule"
                 group_of_poster="users"
                 date_time_posted="2006-05-18 18:44:52"
-                date_time_modified="2015-05-01 13:33:58"
+                date_time_modified="2006-11-14 10:35:19"
                 approved="0"
                 record_id="514">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
+         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Other glycosylation"
                            spec_group="1"/>
          <umod:delta mono_mass="232.064354" avge_mass="232.2768" composition="H(14) C(9) N O(4) S">
             <umod:element symbol="H" number="14"/>
@@ -11708,10 +10783,10 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="Br" number="2"/>
          </umod:delta>
       </umod:mod>
-      <umod:mod title="LRGG" full_name="Ubiquitination" username_of_poster="unimod"
+      <umod:mod title="LeuArgGlyGly" full_name="Ubiquitination" username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2006-10-16 16:39:05"
-                date_time_modified="2014-07-09 16:48:40"
+                date_time_modified="2006-10-16 16:39:05"
                 approved="1"
                 record_id="535">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
@@ -12444,13 +11519,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="verena-meyer"
                 group_of_poster=""
                 date_time_posted="2006-12-04 16:12:54"
-                date_time_modified="2014-07-09 16:57:50"
+                date_time_modified="2006-12-09 17:32:46"
                 approved="0"
                 record_id="698">
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="2"/>
          <umod:delta mono_mass="109.048119" avge_mass="109.1205" composition="H 2H(3) C(6) N O">
             <umod:element symbol="H" number="1"/>
             <umod:element symbol="2H" number="3"/>
@@ -12468,11 +11541,6 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Anal. Chem., 2009, 81 (18), pp 7814–7822</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://pubs.acs.org/doi/abs/10.1021/ac901108g</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="His-&gt;Pro" full_name="His-&gt;Pro substitution" username_of_poster="unimod"
                 group_of_poster=""
@@ -12525,13 +11593,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
       <umod:mod title="NIC" full_name="Nicotinic Acid" username_of_poster="verena-meyer"
                 group_of_poster=""
                 date_time_posted="2006-12-04 16:04:56"
-                date_time_modified="2014-07-09 16:57:01"
+                date_time_modified="2006-12-09 17:31:30"
                 approved="0"
                 record_id="697">
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="2"/>
          <umod:delta mono_mass="105.021464" avge_mass="105.0941" composition="H(3) C(6) N O">
             <umod:element symbol="H" number="3"/>
             <umod:element symbol="C" number="6"/>
@@ -12548,11 +11614,6 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Anal. Chem., 2009, 81 (18), pp 7814–7822</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://pubs.acs.org/doi/abs/10.1021/ac901108g</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="His-&gt;Arg" full_name="His-&gt;Arg substitution" username_of_poster="unimod"
                 group_of_poster=""
@@ -14662,7 +13723,7 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="overalllab"
                 group_of_poster=""
                 date_time_posted="2007-01-31 22:04:44"
-                date_time_modified="2012-11-01 12:02:56"
+                date_time_modified="2007-02-11 19:39:59"
                 approved="0"
                 record_id="734">
          <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
@@ -14672,40 +13733,33 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                            spec_group="1"/>
          <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
                            spec_group="3"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="4"/>
          <umod:delta mono_mass="43.042199" avge_mass="43.0678" composition="H(5) C(2) N">
             <umod:element symbol="H" number="5"/>
             <umod:element symbol="C" number="2"/>
             <umod:element symbol="N" number="1"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>2</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
          <umod:misc_notes>Carbodiimide mediated blocking of free carboxylic acids (Asp/Glu sidechains and C-termini) with ethanolamine; reaction yields an amide-bond between the carboxylic acid of the peptide/protein and the primary amine of ethanolamine; reaction irreversibly modifies carboxylic acids. Shown above is the composition of the mass adduct, after substraction of water.</umod:misc_notes>
       </umod:mod>
       <umod:mod title="TMT6plex" full_name="Sixplex Tandem Mass Tag®"
                 username_of_poster="JUergen.schaefer"
                 group_of_poster=""
                 date_time_posted="2007-03-01 13:44:23"
-                date_time_modified="2014-11-08 15:20:24"
+                date_time_modified="2011-11-25 11:11:19"
                 approved="0"
                 record_id="737">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Isotopic label"
-                           spec_group="6"/>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Isotopic label"
-                           spec_group="5"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Isotopic label"
-                           spec_group="4"/>
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Isotopic label"
                            spec_group="3"/>
+         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Isotopic label"
+                           spec_group="4"/>
          <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Isotopic label"
                            spec_group="2"/>
          <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                            spec_group="1"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Isotopic label"
+                           spec_group="5"/>
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Isotopic label"
+                           spec_group="6"/>
          <umod:delta mono_mass="229.162932" avge_mass="229.2634"
                      composition="H(20) C(8) 13C(4) N 15N O(2)">
             <umod:element symbol="H" number="20"/>
@@ -14716,25 +13770,13 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="O" number="2"/>
          </umod:delta>
          <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
-         <umod:alt_name>Also applies to TMT10plex</umod:alt_name>
          <umod:alt_name>Tandem Mass Tag sixplex labelling kit Proteome Sciences</umod:alt_name>
-         <umod:alt_name>This is a nominal. representative mass</umod:alt_name>
-         <umod:xref>
-            <umod:text>TMT Mass Tagging Kits and Reagents</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>https://www.piercenet.com/instructions/2162073.pdf</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>Juergen.Schaefer@Proteomics.com</umod:text>
             <umod:source>Other</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>TMT10plex Mass Tag Labeling Kits and Reagents</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.piercenet.com/instructions/2162457.pdf</umod:url>
-         </umod:xref>
-         <umod:misc_notes>m/z values of the TMT® fragment ions to be quantified for 6plex and 10plex: 126.12773 127.12476 128.13443 129.13147 130.14114 131.13818. Additional m/z values for 10plex: 127.13108 128.12811 129.13779 130.13482</umod:misc_notes>
+         <umod:misc_notes>Sixplex-TMT® reagents 6TMT-126, 6TMT-127, 6TMT-128, 6TMT-129, 6TMT-130, 6TMT-131 Masses of the TMT® fragment ions to be quantified:126.1283 127.1316 128.1350 129.1383 130.1417 131.1387</umod:misc_notes>
       </umod:mod>
       <umod:mod title="DTT_C" full_name="Dithiothreitol (DTT) on Cys"
                 username_of_poster="stephenaw777"
@@ -14773,15 +13815,9 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                 username_of_poster="JUergen.schaefer"
                 group_of_poster=""
                 date_time_posted="2007-03-01 13:53:36"
-                date_time_modified="2014-11-08 15:19:53"
+                date_time_modified="2011-11-25 11:12:57"
                 approved="0"
                 record_id="738">
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Isotopic label"
-                           spec_group="4"/>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Isotopic label"
-                           spec_group="5"/>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Isotopic label"
-                           spec_group="6"/>
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Isotopic label"
                            spec_group="3"/>
@@ -14789,6 +13825,12 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
                            spec_group="2"/>
          <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
                            spec_group="1"/>
+         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Isotopic label"
+                           spec_group="4"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Isotopic label"
+                           spec_group="5"/>
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Isotopic label"
+                           spec_group="6"/>
          <umod:delta mono_mass="225.155833" avge_mass="225.2921"
                      composition="H(20) C(11) 13C N(2) O(2)">
             <umod:element symbol="H" number="20"/>
@@ -14797,14 +13839,14 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="N" number="2"/>
             <umod:element symbol="O" number="2"/>
          </umod:delta>
-         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
          <umod:alt_name>Tandem Mass Tag Duplex labelling kit Proteome Sciences</umod:alt_name>
+         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
          <umod:xref>
             <umod:text>Juergen.Schaefer@Proteomics.com</umod:text>
             <umod:source>Other</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:misc_notes>Duplex-TMT® reagents 2TMT-126, 2TMT-127. m/z values of the TMT® fragment ions to be quantified: 126.12773 127.13108</umod:misc_notes>
+         <umod:misc_notes>Duplex-TMT® reagents 2TMT-126, 2TMT-127 Masses of the TMT® fragment ions to be quantified: 126.1283 127.1316</umod:misc_notes>
       </umod:mod>
       <umod:mod title="TMT" full_name="Native Tandem Mass Tag®"
                 username_of_poster="JUergen.schaefer"
@@ -15451,11 +14493,11 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
          </umod:xref>
          <umod:misc_notes>The formula has been reduced from H(34) to H(33) on 13 May 2009 so as to give correct observed m/z values. The charge on the TMPP means that ions have one less proton than would be expected</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="Label:13C(6)+GG" full_name="13C6 labeled ubiquitinylation residue"
+      <umod:mod title="Label:13C(6)+GlyGly" full_name="13C6 labeled ubiquitinylation residue"
                 username_of_poster="glick2"
                 group_of_poster=""
                 date_time_posted="2007-12-02 22:45:39"
-                date_time_modified="2014-07-09 16:53:01"
+                date_time_modified="2008-11-21 18:22:05"
                 approved="0"
                 record_id="799">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
@@ -15468,11 +14510,6 @@ corrected by subtraction of a further -O at 8.6.2010</umod:misc_notes>
             <umod:element symbol="N" number="2"/>
             <umod:element symbol="O" number="2"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1021/pr0255708</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>Peng J, Schwartz D, Elias JE, Thoreen CC, Cheng D, Marsischky G, Roelofs J, Finley D, Gygi SP.
 
@@ -15480,6 +14517,11 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:source>Journal</umod:source>
             <umod:url>http://dx.doi.org/10.1038/nbt849</umod:url>
          </umod:xref>
+         <umod:xref>
+            <umod:text>Ong, S-E, I. Kratchmarova, and M. Mann (2003). J Proteome Research 2: 173-181</umod:text>
+            <umod:source>Journal</umod:source>
+            <umod:url>http://dx.doi.org/10.1021/pr0255708</umod:url>
+         </umod:xref>
          <umod:misc_notes>The two glycine residues left on SILAC labeled ubiquitinylated lysine after tryptic digestion</umod:misc_notes>
       </umod:mod>
       <umod:mod title="Arg-&gt;Npo" full_name="Arginine replacement by Nitropyrimidyl ornithine"
@@ -15543,7 +14585,7 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
                 username_of_poster="mengyi"
                 group_of_poster=""
                 date_time_posted="2007-12-03 13:56:58"
-                date_time_modified="2015-01-21 09:40:50"
+                date_time_modified="2010-12-03 16:06:50"
                 approved="0"
                 record_id="800">
          <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
@@ -15562,11 +14604,6 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:source>Misc. URL</umod:source>
             <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=01031206</umod:url>
          </umod:xref>
-         <umod:xref>
-            <umod:text>PLoS ONE 5(11): e14056</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1371/journal.pone.0014056</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Dihydroxyimidazolidine" full_name="Dihydroxy methylglyoxal adduct"
                 username_of_poster="kimzey"
@@ -15588,17 +14625,17 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:url>http://dx.doi.org/10.1002/jms.1144</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Xlink:DFDNB" full_name="Addition of DFDNB crosslinker"
+      <umod:mod title="DFDNB" full_name="Addition of DFDNB crosslinker"
                 username_of_poster="Larsenmarsen"
                 group_of_poster=""
                 date_time_posted="2008-02-13 15:35:40"
-                date_time_modified="2017-01-18 11:37:18"
+                date_time_modified="2008-03-05 16:48:47"
                 approved="0"
                 record_id="825">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Chemical derivative"
-                           spec_group="4"/>
          <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
                            spec_group="3"/>
+         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Chemical derivative"
+                           spec_group="4"/>
          <umod:specificity hidden="1" site="R" position="Anywhere" classification="Chemical derivative"
                            spec_group="2"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
@@ -15611,20 +14648,15 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:element symbol="O" number="4"/>
             <umod:element symbol="F" number="2"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>Pierce data sheet</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://tools.thermofisher.com/content/sfs/manuals/MAN0011313_DFDNB_UG.pdf</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>Chen, X., et al. (1999). Anal. Biochem. 273, 192-203.</umod:text>
             <umod:source>Other</umod:source>
-            <umod:url/>
+            <umod:url>http://www.piercenet.com/products/browse.cfm?fldID=02030220</umod:url>
          </umod:xref>
          <umod:xref>
             <umod:text>Kornblatt, J.A. and Lake, D.F. (1980). Crosslinking of cytochrome oxidase subunits with difluorodinitrobenzene. Can J. Biochem. 58, 219-224.</umod:text>
             <umod:source>Other</umod:source>
-            <umod:url/>
+            <umod:url>http://www.piercenet.com/products/browse.cfm?fldID=02030220</umod:url>
          </umod:xref>
       </umod:mod>
       <umod:mod title="Cy3b-maleimide" full_name="fluorescent dye that labels cysteines"
@@ -15657,46 +14689,18 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:url>http://www.springerlink.com/content/q3u3271467573733/</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Hex(1)HexNAc(1)" full_name="Hex1HexNAc1"
-                username_of_poster="julienjardin"
+      <umod:mod title="Hex1HexNAc1" full_name="Hex1HexNAc1" username_of_poster="julienjardin"
                 group_of_poster=""
                 date_time_posted="2007-10-12 13:16:23"
-                date_time_modified="2015-05-01 15:16:40"
+                date_time_modified="2011-11-21 14:03:42"
                 approved="0"
                 record_id="793">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="365.132196" avge_mass="365.3331" flag="false"
-                              composition="Hex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="10"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
          <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="365.132196" avge_mass="365.3331" flag="false"
-                              composition="Hex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="10"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="2"/>
          <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="365.132196" avge_mass="365.3331" flag="false"
-                              composition="Hex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="10"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
+         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
+                           spec_group="3"/>
          <umod:delta mono_mass="365.132196" avge_mass="365.3331" composition="Hex HexNAc">
             <umod:element symbol="H" number="23"/>
             <umod:element symbol="C" number="14"/>
@@ -15729,11 +14733,11 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:element symbol="S" number="1"/>
          </umod:delta>
       </umod:mod>
-      <umod:mod title="Xlink:BMOE" full_name="Addition of BMOE crosslinker"
+      <umod:mod title="BMOE" full_name="Addition of BMOE crosslinker"
                 username_of_poster="Larsenmarsen"
                 group_of_poster=""
                 date_time_posted="2008-02-13 15:28:55"
-                date_time_modified="2017-01-18 11:38:35"
+                date_time_modified="2008-03-05 16:47:02"
                 approved="0"
                 record_id="824">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
@@ -15747,7 +14751,7 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
          <umod:xref>
             <umod:text>Chen, L.L., Rosa, J.J., Turner, S. and Pepinsky, R.B. (1991). Production of multimeric forms of CD4 through a sugar-based crosslinking strategy. J. Biol. Chem. 266(27), 18237-18243</umod:text>
             <umod:source>Other</umod:source>
-            <umod:url>http://tools.thermofisher.com/content/sfs/manuals/MAN0011308_Bismaleimide_CrsLnk_BMOE_BMB_BMH_UG.pdf</umod:url>
+            <umod:url>http://www.piercenet.com/Products/Browse.cfm?fldID=02030208</umod:url>
          </umod:xref>
       </umod:mod>
       <umod:mod title="Biotin:Thermo-21360" full_name="was Biotin-PEO4-hydrazide"
@@ -15866,16 +14870,16 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
       <umod:mod title="cGMP" full_name="S-guanylation" username_of_poster="atsushiirie"
                 group_of_poster=""
                 date_time_posted="2008-06-21 09:02:53"
-                date_time_modified="2014-02-08 02:24:10"
+                date_time_modified="2009-05-24 20:01:17"
                 approved="0"
                 record_id="849">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
-                           spec_group="2"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:delta mono_mass="343.031785" avge_mass="343.1895"
-                     composition="H(10) C(10) N(5) O(7) P">
-            <umod:element symbol="H" number="10"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
+                           spec_group="2"/>
+         <umod:delta mono_mass="344.039610" avge_mass="344.1974"
+                     composition="H(11) C(10) N(5) O(7) P">
+            <umod:element symbol="H" number="11"/>
             <umod:element symbol="C" number="10"/>
             <umod:element symbol="N" number="5"/>
             <umod:element symbol="O" number="7"/>
@@ -16003,11 +15007,11 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Label:2H(4)+GG" full_name="Ubiquitination 2H4 lysine"
+      <umod:mod title="Label:2H(4)+GlyGly" full_name="Ubiquitination 2H4 lysine"
                 username_of_poster="Raghothama"
                 group_of_poster=""
                 date_time_posted="2008-06-27 14:28:36"
-                date_time_modified="2014-07-09 16:52:49"
+                date_time_modified="2008-08-13 20:29:26"
                 approved="0"
                 record_id="853">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
@@ -16021,26 +15025,22 @@ Nat Biotechnol. 2003 Aug;21(8):921-6</umod:text>
             <umod:element symbol="O" number="2"/>
          </umod:delta>
       </umod:mod>
-      <umod:mod title="spermine" full_name="spermine adduct" username_of_poster="unimod"
+      <umod:mod title="Label:13C(8)15N(2)" full_name="13C(8) 15N(2) Silac label"
+                username_of_poster="nedamoc"
                 group_of_poster=""
-                date_time_posted="2015-01-12 16:07:00"
-                date_time_modified="2015-01-12 16:07:00"
+                date_time_posted="2008-06-30 20:11:08"
+                date_time_modified="2008-07-04 19:07:25"
                 approved="0"
-                record_id="1420">
-         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
+                record_id="854">
+         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
                            spec_group="1"/>
-         <umod:delta mono_mass="185.189198" avge_mass="185.3097" composition="H(23) C(10) N(3)">
-            <umod:element symbol="H" number="23"/>
-            <umod:element symbol="C" number="10"/>
-            <umod:element symbol="N" number="3"/>
+         <umod:delta mono_mass="10.020909" avge_mass="9.9281"
+                     composition="C(-8) 13C(8) N(-2) 15N(2)">
+            <umod:element symbol="C" number="-8"/>
+            <umod:element symbol="13C" number="8"/>
+            <umod:element symbol="N" number="-2"/>
+            <umod:element symbol="15N" number="2"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>Uncovering protein polyamination by the spermine‑specific
-
-antiserum and mass spectrometric analysis</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://dx.doi.org/10.1007/s00726-014-1879-8</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Label:13C(1)2H(3)" full_name="SILAC" username_of_poster="msalek"
                 group_of_poster=""
@@ -16127,11 +15127,11 @@ antiserum and mass spectrometric analysis</umod:text>
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Label:13C(6)15N(2)+GG" full_name="13C(6) 15N(2) Lysine glygly"
+      <umod:mod title="Label:13C(6)15N(2)+GlyGly" full_name="13C(6) 15N(2) Lysine glygly"
                 username_of_poster="Raghothama"
                 group_of_poster=""
                 date_time_posted="2008-08-13 21:56:52"
-                date_time_modified="2014-07-09 16:53:44"
+                date_time_modified="2008-08-14 18:22:40"
                 approved="0"
                 record_id="864">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
@@ -16570,11 +15570,11 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          </umod:xref>
       </umod:mod>
       <umod:mod title="4AcAllylGal"
-                full_name="2,3,4,6-tetra-O-Acetyl-1-allyl-alpha-D-galactopyranoside modification of cysteine"
+                full_name="2,3,4,6-tetra-O-Acetyl-1-allyl-α-D-galactopyranoside modification of cysteine"
                 username_of_poster="paolo.nanni"
                 group_of_poster=""
                 date_time_posted="2009-03-06 16:08:43"
-                date_time_modified="2014-06-23 14:32:00"
+                date_time_modified="2010-02-02 14:27:07"
                 approved="0"
                 record_id="901">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
@@ -16585,12 +15585,12 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:element symbol="O" number="9"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>18275052</umod:text>
+            <umod:text>19798718</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>19798718</umod:text>
+            <umod:text>18275052</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -16681,37 +15681,31 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          </umod:delta>
          <umod:misc_notes>for Brad Strader</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="Galactosyl" full_name="Gluconoylation" username_of_poster="zientek"
+      <umod:mod title="Galactosyl" full_name="Galactosyl hydroxylysine"
+                username_of_poster="zientek"
                 group_of_poster=""
                 date_time_posted="2009-04-21 18:11:24"
-                date_time_modified="2015-05-07 11:02:58"
+                date_time_modified="2010-03-02 20:53:08"
                 approved="0"
                 record_id="907">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term"
-                           classification="Other glycosylation"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
-                           spec_group="1"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="O-linked glycosylation"
+                           spec_group="1">
+            <umod:NeutralLoss mono_mass="162.052824" avge_mass="162.1406" flag="false" composition="Hex">
+               <umod:element symbol="H" number="10"/>
+               <umod:element symbol="C" number="6"/>
+               <umod:element symbol="O" number="5"/>
+            </umod:NeutralLoss>
+         </umod:specificity>
          <umod:delta mono_mass="178.047738" avge_mass="178.1400" composition="O Hex">
             <umod:element symbol="H" number="10"/>
             <umod:element symbol="C" number="6"/>
             <umod:element symbol="O" number="6"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>ABRF Delta Mass</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.abrf.org/index.cfm/dm.details?DMID=226&amp;AvgMass=all&amp;Margin=0</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>743239</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/743239?ordinalpos=1&amp;itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DefaultReportPanel.Pubmed_RVDocSum</umod:url>
          </umod:xref>
-         <umod:xref>
-            <umod:text>18083862</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&amp;cmd=Retrieve&amp;dopt=AbstractPlus&amp;list_uids=18083862&amp;itool=pubmed_docsum</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="SMCC-maleimide"
                 full_name="Modified SMCC maleimide with 3-(dimethylamino)-1-propylamine"
@@ -16739,21 +15733,12 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                 username_of_poster="rlmoritz"
                 group_of_poster=""
                 date_time_posted="2009-06-23 18:27:32"
-                date_time_modified="2015-05-01 15:07:51"
+                date_time_modified="2009-06-26 11:12:01"
                 approved="0"
                 record_id="910">
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="228.111007" avge_mass="228.2450" flag="false"
-                              composition="H(6) C(4) N(2) dHex">
-               <umod:element symbol="H" number="16"/>
-               <umod:element symbol="C" number="10"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="228.111007" avge_mass="228.2450" composition="H(6) C(4) N(2) dHex">
+                           spec_group="1"/>
+         <umod:delta mono_mass="228.111007" avge_mass="228.2450" composition="H(16) C(10) N(2) O(4)">
             <umod:element symbol="H" number="16"/>
             <umod:element symbol="C" number="10"/>
             <umod:element symbol="N" number="2"/>
@@ -16826,13 +15811,13 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
       <umod:mod title="Ethoxyformyl" full_name="Ethoxyformylation" username_of_poster="BThomas"
                 group_of_poster=""
                 date_time_posted="2009-07-24 17:00:29"
-                date_time_modified="2015-10-30 14:01:47"
+                date_time_modified="2009-07-26 22:05:56"
                 approved="0"
                 record_id="915">
          <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
-         <umod:delta mono_mass="72.021129" avge_mass="72.0627" composition="H(4) C(3) O(2)">
-            <umod:element symbol="H" number="4"/>
+         <umod:delta mono_mass="73.028954" avge_mass="73.0706" composition="H(5) C(3) O(2)">
+            <umod:element symbol="H" number="5"/>
             <umod:element symbol="C" number="3"/>
             <umod:element symbol="O" number="2"/>
          </umod:delta>
@@ -16915,11 +15900,11 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:element symbol="S" number="-1"/>
          </umod:delta>
       </umod:mod>
-      <umod:mod title="Label:13C(4)15N(2)+GG" full_name="13C(4) 15N(2) Lysine glygly"
+      <umod:mod title="Label:13C(4)15N(2)+GlyGly" full_name="13C(4) 15N(2) Lysine glygly"
                 username_of_poster="mpcusack"
                 group_of_poster=""
                 date_time_posted="2009-09-16 21:04:07"
-                date_time_modified="2014-07-09 16:53:30"
+                date_time_modified="2009-10-02 18:13:08"
                 approved="0"
                 record_id="923">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
@@ -17098,13 +16083,12 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                 username_of_poster="Bryan"
                 group_of_poster=""
                 date_time_posted="2009-10-15 17:07:41"
-                date_time_modified="2014-05-19 10:13:05"
+                date_time_modified="2009-10-16 14:40:43"
                 approved="0"
                 record_id="936">
          <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Artefact"
                            spec_group="1"/>
-         <umod:delta mono_mass="33.961028" avge_mass="34.4451" composition="H(-1) Cl">
-            <umod:element symbol="H" number="-1"/>
+         <umod:delta mono_mass="34.968853" avge_mass="35.4530" composition="Cl">
             <umod:element symbol="Cl" number="1"/>
          </umod:delta>
          <umod:xref>
@@ -17116,15 +16100,14 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
       <umod:mod title="dichlorination" full_name="Dichlorination" username_of_poster="Bryan"
                 group_of_poster=""
                 date_time_posted="2009-10-15 17:12:42"
-                date_time_modified="2014-05-19 10:13:24"
+                date_time_modified="2012-06-22 14:13:56"
                 approved="0"
                 record_id="937">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2"/>
          <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Artefact"
                            spec_group="1"/>
-         <umod:delta mono_mass="67.922055" avge_mass="68.8901" composition="H(-2) Cl(2)">
-            <umod:element symbol="H" number="-2"/>
+         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
+                           spec_group="2"/>
+         <umod:delta mono_mass="69.937705" avge_mass="70.9060" composition="Cl(2)">
             <umod:element symbol="Cl" number="2"/>
          </umod:delta>
          <umod:xref>
@@ -17194,11 +16177,11 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:url>http://www.piercenet.com/files/1763dh4.pdf</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="DimethylamineGMBS" full_name="Modified GMBS X linker"
+      <umod:mod title="DimethylamineGMBS" full_name="Modified GMBS X linker for proteins"
                 username_of_poster="anikolakakis"
                 group_of_poster=""
                 date_time_posted="2009-11-04 20:26:57"
-                date_time_modified="2017-01-18 11:52:27"
+                date_time_modified="2009-11-13 16:38:29"
                 approved="0"
                 record_id="943">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
@@ -17212,7 +16195,7 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          <umod:xref>
             <umod:text>Pierce data sheet</umod:text>
             <umod:source>Misc. URL</umod:source>
-            <umod:url>http://tools.thermofisher.com/content/sfs/manuals/MAN0011551_GMBS_SulfoGMBS_UG.pdf</umod:url>
+            <umod:url>http://www.piercenet.com/files/1763dh4.pdf</umod:url>
          </umod:xref>
       </umod:mod>
       <umod:mod title="Label:15N(2)2H(9)" full_name="SILAC label" username_of_poster="mskim"
@@ -17397,7 +16380,7 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                 username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2010-01-20 12:23:59"
-                date_time_modified="2015-03-19 09:31:49"
+                date_time_modified="2010-01-20 12:24:16"
                 approved="0"
                 record_id="954">
          <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Artefact"
@@ -17406,17 +16389,10 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                            spec_group="1"/>
          <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
-                           spec_group="3"/>
          <umod:delta mono_mass="61.913495" avge_mass="63.3931" composition="H(-2) Zn">
             <umod:element symbol="H" number="-2"/>
             <umod:element symbol="Zn" number="1"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>Superoxide dismutase [Cu-Zn]</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.uniprot.org/uniprot/P07509</umod:url>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Cation:Ag" full_name="Replacement of proton by silver"
                 username_of_poster="unimod"
@@ -17577,27 +16553,22 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
       <umod:mod title="BITC" full_name="Benzyl isothiocyanate" username_of_poster="miyoshin"
                 group_of_poster=""
                 date_time_posted="2010-03-09 09:42:12"
-                date_time_modified="2013-04-26 06:26:47"
+                date_time_modified="2010-04-05 21:26:31"
                 approved="0"
                 record_id="978">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term"
-                           classification="Chemical derivative"
-                           spec_group="3"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                            spec_group="2"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
+         <umod:specificity hidden="1" site="N-term" position="Any N-term"
+                           classification="Chemical derivative"
+                           spec_group="3"/>
          <umod:delta mono_mass="149.029920" avge_mass="149.2129" composition="H(7) C(8) N S">
             <umod:element symbol="H" number="7"/>
             <umod:element symbol="C" number="8"/>
             <umod:element symbol="N" number="1"/>
             <umod:element symbol="S" number="1"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>22835833</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="Carbofuran"
                 full_name="2,3-dihydro-2,2-dimethyl-7-benzofuranol N-methyl carbamate"
@@ -17625,27 +16596,22 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                 username_of_poster="miyoshin"
                 group_of_poster=""
                 date_time_posted="2010-03-09 10:06:18"
-                date_time_modified="2013-04-26 06:27:10"
+                date_time_modified="2010-04-05 21:26:00"
                 approved="0"
                 record_id="979">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term"
-                           classification="Chemical derivative"
-                           spec_group="3"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                            spec_group="2"/>
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
+         <umod:specificity hidden="1" site="N-term" position="Any N-term"
+                           classification="Chemical derivative"
+                           spec_group="3"/>
          <umod:delta mono_mass="163.045570" avge_mass="163.2395" composition="H(9) C(9) N S">
             <umod:element symbol="H" number="9"/>
             <umod:element symbol="C" number="9"/>
             <umod:element symbol="N" number="1"/>
             <umod:element symbol="S" number="1"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>22835833</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
       </umod:mod>
       <umod:mod title="thioacylPA" full_name="membrane protein extraction"
                 username_of_poster="tmiwamoto"
@@ -17791,7 +16757,7 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                 username_of_poster="jorogers6"
                 group_of_poster=""
                 date_time_posted="2010-04-22 21:57:44"
-                date_time_modified="2014-11-08 16:06:08"
+                date_time_modified="2010-04-28 18:04:40"
                 approved="0"
                 record_id="984">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
@@ -17810,21 +16776,16 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:source>Other</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Cysteine Reactive Tandem Mass Tags for Subproteome Labeling, Enrichment and Quantitation</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://bit.ly/1GBnaC8</umod:url>
-         </umod:xref>
          <umod:misc_notes>This modification describes the native cysteine-reactive cysTMT Reagent without isotopic label. Upon CID, this reagent releases a reporter ion of 126.127725 (monoisotopic mass).</umod:misc_notes>
       </umod:mod>
       <umod:mod title="cysTMT6plex" full_name="cysteine-reactive Sixplex Tandem Mass Tag®"
                 username_of_poster="jorogers6"
                 group_of_poster=""
                 date_time_posted="2010-04-22 22:05:46"
-                date_time_modified="2016-09-22 14:38:08"
+                date_time_modified="2010-04-22 22:06:15"
                 approved="0"
                 record_id="985">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Isotopic label"
+         <umod:specificity hidden="0" site="C" position="Anywhere" classification="Isotopic label"
                            spec_group="1"/>
          <umod:delta mono_mass="304.177202" avge_mass="304.3962"
                      composition="H(25) C(10) 13C(4) N(2) 15N O(2) S">
@@ -17842,11 +16803,6 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:source>Other</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Cysteine Reactive Tandem Mass Tags for Subproteome Labeling, Enrichment and Quantitation</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://bit.ly/1GBnaC8</umod:url>
-         </umod:xref>
          <umod:misc_notes>This modification describes the isobaric sixplex cysteine-reactive cysTMT6 Reagents with isotopic labels. Upon CID, these reagents release reporter ions of 126.127725, 127.131079, 128.134433, 129.137787, 130.141141, and 131.138176 (monoisotopic mass).</umod:misc_notes>
       </umod:mod>
       <umod:mod title="ISD_z+2_ion" full_name="ISD (z+2)-series" username_of_poster="suckau"
@@ -17883,6 +16839,29 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          </umod:delta>
          <umod:misc_notes>sometimes observed after elution of phosphopeptides from TiO2 with ammonium hydroxide</umod:misc_notes>
       </umod:mod>
+      <umod:mod title="BHAc" full_name="N-biotinyl-6-aminohexanoyl"
+                username_of_poster="natfre08"
+                group_of_poster=""
+                date_time_posted="2010-07-13 14:38:17"
+                date_time_modified="2010-08-02 17:37:08"
+                approved="0"
+                record_id="998">
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
+                           spec_group="1"/>
+         <umod:delta mono_mass="339.161662" avge_mass="339.4530"
+                     composition="H(25) C(16) N(3) O(3) S">
+            <umod:element symbol="H" number="25"/>
+            <umod:element symbol="C" number="16"/>
+            <umod:element symbol="N" number="3"/>
+            <umod:element symbol="O" number="3"/>
+            <umod:element symbol="S" number="1"/>
+         </umod:delta>
+         <umod:xref>
+            <umod:text>Patricelli et al. (2007). Functional Interrogation of the Kinome Using Nucleotide Acyl Phosphates. Biochemistry, 46, 350-358.</umod:text>
+            <umod:source>Journal</umod:source>
+            <umod:url>http://pubs.acs.org/doi/abs/10.1021/bi062142x</umod:url>
+         </umod:xref>
+      </umod:mod>
       <umod:mod title="Biotin:Sigma-B1267" full_name="was Biotin-maleimide"
                 username_of_poster="mpcusack"
                 group_of_poster=""
@@ -18186,11 +17165,11 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:element symbol="15N" number="4"/>
          </umod:delta>
       </umod:mod>
-      <umod:mod title="Cys-&gt;CamSec" full_name="Sec Iodoacetamide derivative"
+      <umod:mod title="SecCarbamidomethyl" full_name="Sec Iodoacetamide derivative"
                 username_of_poster="BThomas"
                 group_of_poster=""
                 date_time_posted="2010-11-04 12:00:12"
-                date_time_modified="2016-02-01 14:19:53"
+                date_time_modified="2010-11-05 16:55:08"
                 approved="0"
                 record_id="1008">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Non-standard residue"
@@ -18215,7 +17194,7 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                 username_of_poster="BThomas"
                 group_of_poster=""
                 date_time_posted="2010-11-04 12:29:10"
-                date_time_modified="2013-08-19 16:44:59"
+                date_time_modified="2012-03-19 15:31:24"
                 approved="0"
                 record_id="1009">
          <umod:specificity hidden="1" site="C" position="Any N-term"
@@ -18224,7 +17203,6 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          <umod:delta mono_mass="12.000000" avge_mass="12.0107" composition="C">
             <umod:element symbol="C" number="1"/>
          </umod:delta>
-         <umod:alt_name>formaldehyde adduct</umod:alt_name>
          <umod:alt_name>thiazolidine-2-carboxylic acid</umod:alt_name>
          <umod:xref>
             <umod:text>65126-70-7</umod:text>
@@ -18287,18 +17265,18 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          </umod:xref>
       </umod:mod>
       <umod:mod title="Xlink:DSS"
-                full_name="Water-quenched monolink of DSS/BS3 crosslinker to Lys or N-terminus"
+                full_name="Monolink of DSS/BS3 crosslinker to Lys or N-terminus"
                 username_of_poster="Kramerh"
                 group_of_poster=""
                 date_time_posted="2011-02-07 14:20:22"
-                date_time_modified="2015-06-16 14:23:40"
+                date_time_modified="2011-02-11 14:33:33"
                 approved="0"
                 record_id="1020">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Chemical derivative"
                            spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
+                           spec_group="1"/>
          <umod:delta mono_mass="156.078644" avge_mass="156.1791" composition="H(12) C(8) O(3)">
             <umod:element symbol="H" number="12"/>
             <umod:element symbol="C" number="8"/>
@@ -18428,29 +17406,23 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:url>http://dx.doi.org/10.1002/anie.201007175</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Xlink:EGS244" full_name="Water quenched monolink of EGS cross-linker"
+      <umod:mod title="Xlink:EGS" full_name="Monolink of EGS crosslinker to Lys or N-terminus"
                 username_of_poster="Kramerh"
                 group_of_poster=""
                 date_time_posted="2011-02-07 17:40:36"
-                date_time_modified="2017-02-02 11:01:33"
+                date_time_modified="2011-02-11 14:33:05"
                 approved="0"
                 record_id="1021">
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
+                           spec_group="1"/>
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Chemical derivative"
                            spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
          <umod:delta mono_mass="244.058303" avge_mass="244.1981" composition="H(12) C(10) O(7)">
             <umod:element symbol="H" number="12"/>
             <umod:element symbol="C" number="10"/>
             <umod:element symbol="O" number="7"/>
          </umod:delta>
-         <umod:alt_name>Ethylene glycolbis(succinimidylsuccinate)</umod:alt_name>
-         <umod:xref>
-            <umod:text>Pierce data sheet</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>https://tools.thermofisher.com/content/sfs/manuals/MAN0011281_EGS_SulfoEGS_UG.pdf</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>36892</umod:text>
             <umod:source>PubMed PMID</umod:source>
@@ -18598,12 +17570,12 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:url>http://www.ncbi.nlm.nih.gov/pubmed?term=Chemical%20cross-linking%20and%20mass%20spectrometry%20for%20mapping%20three-dimensional%20structures%20of%20proteins%20and%20protein%20complexes</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Xlink:EGS115"
-                full_name="Cleavage product of EGS protein crosslinks by hydroylamine treatment"
+      <umod:mod title="Xlink:EGScleaved"
+                full_name="EGS crosslinker to Lys or N-terminus following hydroxylamine cleavage"
                 username_of_poster="Kramerh"
                 group_of_poster=""
                 date_time_posted="2011-02-25 17:16:45"
-                date_time_modified="2017-02-02 11:01:16"
+                date_time_modified="2011-03-04 10:43:22"
                 approved="0"
                 record_id="1028">
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
@@ -18611,29 +17583,24 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                            spec_group="2"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
-         <umod:delta mono_mass="115.026943" avge_mass="115.0874" composition="H(5) C(4) N O(3)">
+         <umod:delta mono_mass="99.032028" avge_mass="99.0880" composition="H(5) C(4) N O(2)">
             <umod:element symbol="H" number="5"/>
             <umod:element symbol="C" number="4"/>
             <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="3"/>
+            <umod:element symbol="O" number="2"/>
          </umod:delta>
-         <umod:alt_name>Ethylene glycolbis(succinimidylsuccinate)</umod:alt_name>
-         <umod:xref>
-            <umod:text>Pierce data sheet</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>https://tools.thermofisher.com/content/sfs/manuals/MAN0011281_EGS_SulfoEGS_UG.pdf</umod:url>
-         </umod:xref>
+         <umod:alt_name>Cleavage product of EGS protein crosslinks by hydroylamine treatment</umod:alt_name>
          <umod:xref>
             <umod:text>36892</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url>http://www.ncbi.nlm.nih.gov/pubmed?term=a%20new%20cleavable%20reagent%20for%20cross-linking%20and%20reversible%20immobilization</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Cys-&gt;SecNEM" full_name="N-ethylmaleimide on selenocysteines"
+      <umod:mod title="SecNEM" full_name="N-ethylmaleimide on selenocysteines"
                 username_of_poster="mpcusack"
                 group_of_poster=""
                 date_time_posted="2011-03-31 18:29:45"
-                date_time_modified="2016-02-01 14:20:14"
+                date_time_modified="2011-03-31 18:41:41"
                 approved="0"
                 record_id="1033">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Non-standard residue"
@@ -18648,11 +17615,6 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:element symbol="Se" number="1"/>
          </umod:delta>
          <umod:alt_name>SecNEM</umod:alt_name>
-         <umod:xref>
-            <umod:text>reaction</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.chemistry.ucsc.edu/~fink/231/Image118.gif</umod:url>
-         </umod:xref>
          <umod:xref>
             <umod:text>18283440</umod:text>
             <umod:source>PubMed PMID</umod:source>
@@ -18668,12 +17630,17 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
+         <umod:xref>
+            <umod:text>reaction</umod:text>
+            <umod:source>Misc. URL</umod:source>
+            <umod:url>http://www.chemistry.ucsc.edu/~fink/231/Image118.gif</umod:url>
+         </umod:xref>
       </umod:mod>
-      <umod:mod title="Cys-&gt;SecNEM:2H(5)" full_name="D5 N-ethylmaleimide on selenocysteines"
+      <umod:mod title="SecNEM:2H(5)" full_name="D5 N-ethylmaleimide on selenocysteines"
                 username_of_poster="mpcusack"
                 group_of_poster=""
                 date_time_posted="2011-03-31 18:32:32"
-                date_time_modified="2016-02-01 14:20:31"
+                date_time_modified="2011-03-31 18:41:50"
                 approved="0"
                 record_id="1034">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
@@ -18690,7 +17657,7 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          </umod:delta>
          <umod:alt_name>SecNEM D5</umod:alt_name>
          <umod:xref>
-            <umod:text>18283440</umod:text>
+            <umod:text>11813307</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -18705,7 +17672,7 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:url>http://www.chemistry.ucsc.edu/~fink/231/Image118.gif</umod:url>
          </umod:xref>
          <umod:xref>
-            <umod:text>11813307</umod:text>
+            <umod:text>18283440</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -18730,7 +17697,7 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
                 username_of_poster="rbomgard"
                 group_of_poster=""
                 date_time_posted="2011-03-02 20:33:20"
-                date_time_modified="2015-04-20 16:11:56"
+                date_time_modified="2011-03-18 13:44:07"
                 approved="0"
                 record_id="1031">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
@@ -18741,9 +17708,9 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:element symbol="N" number="2"/>
             <umod:element symbol="O" number="2"/>
          </umod:delta>
-         <umod:alt_name>desthiobiotin-GTP</umod:alt_name>
-         <umod:alt_name>desthiobiotin-ADP</umod:alt_name>
          <umod:alt_name>desthiobiotin-ATP</umod:alt_name>
+         <umod:alt_name>desthiobiotin-ADP</umod:alt_name>
+         <umod:alt_name>desthiobiotin-GTP</umod:alt_name>
          <umod:xref>
             <umod:text>Patricelli, M.P., et al. (2007). Functional interrogation of the kinome using nucleotide acyl phosphates. Biochemistry 46:350-8</umod:text>
             <umod:source>Journal</umod:source>
@@ -18752,12 +17719,12 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
          <umod:xref>
             <umod:text>Kinase Enrichment Kits and Probes</umod:text>
             <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.lifetechnologies.com/order/catalog/product/88310</umod:url>
+            <umod:url>http://www.piercenet.com/browse.cfm?fldID=3D3869A6-C21A-B057-1746-32B318A394B1</umod:url>
          </umod:xref>
          <umod:xref>
             <umod:text>GTPase Enrichment Kit and Probes</umod:text>
             <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.lifetechnologies.com/order/catalog/product/88314</umod:url>
+            <umod:url>http://www.piercenet.com/browse.cfm?fldID=A3E85706-9C15-11DA-341A-2C8A2849EA03</umod:url>
          </umod:xref>
       </umod:mod>
       <umod:mod title="TAMRA-FP" full_name="TAMRA fluorophosphonate modification of serine"
@@ -18825,13 +17792,9 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
       <umod:mod title="Deoxyhypusine" full_name="Deoxyhypusine" username_of_poster="cbarrero"
                 group_of_poster=""
                 date_time_posted="2011-06-15 12:04:35"
-                date_time_modified="2015-01-12 16:03:08"
+                date_time_modified="2011-06-25 03:09:15"
                 approved="0"
                 record_id="1041">
-         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2">
-            <umod:misc_notes>putrescine Q-PUT</umod:misc_notes>
-         </umod:specificity>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
          <umod:delta mono_mass="71.073499" avge_mass="71.1210" composition="H(9) C(4) N">
@@ -18840,22 +17803,15 @@ Efficient incorporation of unsaturated methionine analogues into proteins in viv
             <umod:element symbol="N" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>20942800</umod:text>
+            <umod:text>10542236</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>10542236</umod:text>
+            <umod:text>20942800</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
-         <umod:xref>
-            <umod:text>Uncovering protein polyamination by the spermine‑specific
-
-antiserum and mass spectrometric analysis</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1007/s00726-014-1879-8</umod:url>
-         </umod:xref>
          <umod:misc_notes>Deoxyhypusine synthase catalyzes the formation of a deoxyhypusine by transferring an aminobutyl moiety from spermidine onto a conserved lysine residue within the eIF5A</umod:misc_notes>
       </umod:mod>
       <umod:mod title="Acetyldeoxyhypusine" full_name="Acetyldeoxyhypusine"
@@ -22414,7 +21370,7 @@ Szychowski J, Mahdavi A, Hodas JJ, Bagert JD, Ngo JT, Landgraf P, Dieterich DC,
                 username_of_poster="Magnojunqueira"
                 group_of_poster=""
                 date_time_posted="2011-06-24 16:58:05"
-                date_time_modified="2013-04-16 23:21:26"
+                date_time_modified="2011-06-24 21:14:03"
                 approved="0"
                 record_id="1251">
          <umod:specificity hidden="1" site="N-term" position="Anywhere"
@@ -22422,9 +21378,9 @@ Szychowski J, Mahdavi A, Hodas JJ, Bagert JD, Ngo JT, Landgraf P, Dieterich DC,
                            spec_group="1">
             <umod:misc_notes>Sulfo-SBED Label Transfer ReagentrnReaction path that does not remove one Hidrogen atom from the target peptide</umod:misc_notes>
          </umod:specificity>
-         <umod:delta mono_mass="548.223945" avge_mass="548.7211"
-                     composition="H(36) C(25) N(6) O(4) S(2)">
-            <umod:element symbol="H" number="36"/>
+         <umod:delta mono_mass="547.216120" avge_mass="547.7132"
+                     composition="H(35) C(25) N(6) O(4) S(2)">
+            <umod:element symbol="H" number="35"/>
             <umod:element symbol="C" number="25"/>
             <umod:element symbol="N" number="6"/>
             <umod:element symbol="O" number="4"/>
@@ -22829,7 +21785,7 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
                 username_of_poster="alejandro"
                 group_of_poster=""
                 date_time_posted="2011-09-15 19:31:10"
-                date_time_modified="2014-12-01 10:35:27"
+                date_time_modified="2011-09-23 16:33:45"
                 approved="0"
                 record_id="1270">
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
@@ -22844,7 +21800,13 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
             <umod:element symbol="S" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>Perla-Kajan J., Twardowski T., Jakubowski H. Amino Acids. 2007. 32(4) 561-572. Jakubowski H. J. Nutr. 2006. 136(6S) Suppl. 1741S-1749S. Jakubowski H. Cell. Mol. Life Sci. 2004. 61(4). 470-487. Jakubowski H. J. Biol. Chem. 2002. 277(34) 30425-30428.</umod:text>
+            <umod:text>Perla-Kajan J., Twardowski T., Jakubowski H. Amino Acids. 2007. V. 32. № 4. P. 561–572.
+
+Jakubowski H. J. Nutr. 2006. V. 136. 6S Suppl. P. 1741S–1749S.
+
+Jakubowski H. Cell. Mol. Life Sci. 2004. V. 61. № 4. P. 470–487.
+
+Jakubowski H. J. Biol. Chem. 2002. V. 277.№ 34. P. 30425–30428.</umod:text>
             <umod:source>Journal</umod:source>
             <umod:url/>
          </umod:xref>
@@ -22996,15 +21958,14 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
             <umod:element symbol="O" number="1"/>
          </umod:delta>
       </umod:mod>
-      <umod:mod title="IMEHex(2)NeuAc(1)"
-                full_name="Glycosylation with IME linked Hex(2) NeuAc"
+      <umod:mod title="IMEHex(2)NeuAc" full_name="Glycosylation with IME linked Hex(2) NeuAc"
                 username_of_poster="BThomas"
                 group_of_poster=""
                 date_time_posted="2011-11-11 12:06:36"
-                date_time_modified="2015-05-01 14:20:42"
+                date_time_modified="2011-11-21 09:58:45"
                 approved="0"
                 record_id="1286">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other glycosylation"
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
          <umod:delta mono_mass="688.199683" avge_mass="688.6527"
                      composition="H(3) C(2) N S Hex(2) NeuAc">
@@ -23045,44 +22006,29 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
                 username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2011-11-21 13:21:06"
-                date_time_modified="2013-05-16 10:59:12"
+                date_time_modified="2011-11-21 13:21:36"
                 approved="0"
                 record_id="1290">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Artefact"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Artefact"
+         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Artefact"
-                           spec_group="4"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Artefact"
-                           spec_group="5"/>
          <umod:delta mono_mass="114.042927" avge_mass="114.1026" composition="H(6) C(4) N(2) O(2)">
             <umod:element symbol="H" number="6"/>
             <umod:element symbol="C" number="4"/>
             <umod:element symbol="N" number="2"/>
             <umod:element symbol="O" number="2"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>18511913</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
          <umod:misc_notes>Mentioned by Marshall Bern</umod:misc_notes>
       </umod:mod>
       <umod:mod title="Dimethyl:2H(6)" full_name="Dimethyl-Medium" username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2011-11-21 13:27:00"
-                date_time_modified="2013-02-22 12:32:45"
+                date_time_modified="2011-11-22 14:34:18"
                 approved="0"
                 record_id="1291">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                            spec_group="2"/>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="3"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
+                           spec_group="1"/>
          <umod:delta mono_mass="34.068961" avge_mass="34.0901" composition="H(-2) 2H(6) C(2)">
             <umod:element symbol="H" number="-2"/>
             <umod:element symbol="2H" number="6"/>
@@ -23233,8 +22179,8 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
                 username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2011-11-21 14:56:07"
-                date_time_modified="2015-05-06 12:07:14"
-                approved="0"
+                date_time_modified="2011-11-21 14:56:07"
+                approved="1"
                 record_id="1301">
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Other"
                            spec_group="1"/>
@@ -23289,39 +22235,15 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
       <umod:mod title="NeuAc" full_name="N-acetyl neuraminic acid" username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2011-11-25 10:40:54"
-                date_time_modified="2015-05-01 15:11:52"
+                date_time_modified="2011-11-25 10:40:54"
                 approved="0"
                 record_id="1303">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="291.095417" avge_mass="291.2546" flag="false" composition="NeuAc">
-               <umod:element symbol="H" number="17"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="8"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="291.095417" avge_mass="291.2546" flag="false" composition="NeuAc">
-               <umod:element symbol="H" number="17"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="8"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="291.095417" avge_mass="291.2546" flag="false" composition="NeuAc">
-               <umod:element symbol="H" number="17"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="8"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
+                           spec_group="3"/>
          <umod:delta mono_mass="291.095417" avge_mass="291.2546" composition="NeuAc">
             <umod:element symbol="H" number="17"/>
             <umod:element symbol="C" number="11"/>
@@ -23332,39 +22254,15 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
       <umod:mod title="NeuGc" full_name="N-glycoyl neuraminic acid" username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2011-11-25 10:41:35"
-                date_time_modified="2015-05-01 15:13:41"
+                date_time_modified="2011-11-25 10:41:35"
                 approved="0"
                 record_id="1304">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="307.090331" avge_mass="307.2540" flag="false" composition="NeuGc">
-               <umod:element symbol="H" number="17"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="307.090331" avge_mass="307.2540" flag="false" composition="NeuGc">
-               <umod:element symbol="H" number="17"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
          <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="307.090331" avge_mass="307.2540" flag="false" composition="NeuGc">
-               <umod:element symbol="H" number="17"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
+                           spec_group="1"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
+                           spec_group="3"/>
          <umod:delta mono_mass="307.090331" avge_mass="307.2540" composition="NeuGc">
             <umod:element symbol="H" number="17"/>
             <umod:element symbol="C" number="11"/>
@@ -23375,31 +22273,13 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
       <umod:mod title="Propyl" full_name="Propyl" username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2011-11-25 11:06:09"
-                date_time_modified="2014-10-17 11:31:01"
+                date_time_modified="2011-11-25 11:06:09"
                 approved="0"
                 record_id="1305">
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3">
-            <umod:misc_notes>propyl ester</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="2"/>
          <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
                            spec_group="1"/>
-         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
-                           spec_group="4">
-            <umod:misc_notes>propyl ester</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="C-term" position="Any C-term"
-                           classification="Chemical derivative"
-                           spec_group="5">
-            <umod:misc_notes>propyl ester</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="C-term" position="Protein C-term"
-                           classification="Chemical derivative"
-                           spec_group="6">
-            <umod:misc_notes>propyl ester</umod:misc_notes>
-         </umod:specificity>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
+                           spec_group="2"/>
          <umod:delta mono_mass="42.046950" avge_mass="42.0797" composition="H(6) C(3)">
             <umod:element symbol="H" number="6"/>
             <umod:element symbol="C" number="3"/>
@@ -23479,10 +22359,10 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
                 username_of_poster="hbromage"
                 group_of_poster=""
                 date_time_posted="2012-08-27 21:50:06"
-                date_time_modified="2015-01-02 09:46:35"
+                date_time_modified="2012-09-14 23:52:21"
                 approved="0"
                 record_id="1348">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
+         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
          <umod:delta mono_mass="753.262796" avge_mass="753.9046"
                      composition="H(45) C(37) N(4) O(9) S(2)">
@@ -23535,13 +22415,13 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
                 username_of_poster="yiyingzhu"
                 group_of_poster=""
                 date_time_posted="2011-12-15 19:48:15"
-                date_time_modified="2015-10-12 16:16:13"
+                date_time_modified="2011-12-16 15:18:16"
                 approved="0"
                 record_id="1313">
          <umod:specificity hidden="1" site="N-term" position="Protein N-term"
                            classification="Chemical derivative"
                            spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
+         <umod:specificity hidden="1" site="L" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
          <umod:delta mono_mass="96.057515" avge_mass="96.1271" composition="H(8) C(6) O">
             <umod:element symbol="H" number="8"/>
@@ -23549,12 +22429,12 @@ Glushchenko A. V., Jacobsen D. W. Antioxid. Redox Signal. 2007. V. 9. P. 1883–
             <umod:element symbol="O" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>21778411</umod:text>
+            <umod:text>9632657</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
          <umod:xref>
-            <umod:text>9632657</umod:text>
+            <umod:text>21778411</umod:text>
             <umod:source>PubMed PMID</umod:source>
             <umod:url/>
          </umod:xref>
@@ -23738,17 +22618,17 @@ M. Zimnicka, et al.  "Tunable Charge Tags for Electron-Based Methods of Peptide
                 username_of_poster="unimod"
                 group_of_poster=""
                 date_time_posted="2012-02-15 12:05:48"
-                date_time_modified="2016-09-22 15:14:06"
+                date_time_modified="2012-02-15 12:08:24"
                 approved="0"
                 record_id="1322">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
+         <umod:specificity hidden="0" site="Y" position="Anywhere" classification="Isotopic label"
                            spec_group="3">
             <umod:misc_notes>Low abundance</umod:misc_notes>
          </umod:specificity>
+         <umod:specificity hidden="0" site="N-term" position="Any N-term" classification="Isotopic label"
+                           spec_group="2"/>
+         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Isotopic label"
+                           spec_group="1"/>
          <umod:delta mono_mass="145.132163" avge_mass="145.2229"
                      composition="H(13) 2H(2) C(8) N 18O">
             <umod:element symbol="H" number="13"/>
@@ -23947,14159 +22827,229 @@ M. Zimnicka, et al.  "Tunable Charge Tags for Electron-Based Methods of Peptide
             <umod:url/>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="HN3_mustard"
-                full_name="Modification by hydroxylated tris-(2-chloroethyl)amine (HN-3)"
-                username_of_poster="vthompson"
+      <umod:mod title="Myristoyl+Delta:H(18)C(12)N(6)O(4)" full_name="myristic acid analogue"
+                username_of_poster="rserwa"
                 group_of_poster=""
-                date_time_posted="2013-08-23 19:13:36"
-                date_time_modified="2013-09-23 11:42:08"
+                date_time_posted="2012-05-29 12:27:50"
+                date_time_modified="2012-06-15 10:03:35"
                 approved="0"
-                record_id="1389">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="3"/>
-         <umod:delta mono_mass="131.094629" avge_mass="131.1729" composition="H(13) C(6) N O(2)">
-            <umod:element symbol="H" number="13"/>
-            <umod:element symbol="C" number="6"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="2"/>
+                record_id="1333">
+         <umod:specificity hidden="1" site="G" position="Any N-term" classification="Chemical derivative"
+                           spec_group="1">
+            <umod:misc_notes>post-translational enzymatic myristoylation of glycine with a synthetic alkynyl-analogue of myristic acid followed by in vitro CuAAC reaction to an azido-enrichment reagent</umod:misc_notes>
+         </umod:specificity>
+         <umod:delta mono_mass="520.337319" avge_mass="520.6648" composition="H(44) C(26) N(6) O(5)">
+            <umod:element symbol="H" number="44"/>
+            <umod:element symbol="C" number="26"/>
+            <umod:element symbol="N" number="6"/>
+            <umod:element symbol="O" number="5"/>
          </umod:delta>
-         <umod:xref>
-            <umod:text>Thompson, Vanessa R. and DeCaprio, Anthony P. "Covalent Adduction of Nitrogen Mustards to Model Protein Nucleophiles" Chem. Res. Toxicol., 2013, 26 (8), pp 1263-1271</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://pubs.acs.org/doi/abs/10.1021/tx400188w</umod:url>
-         </umod:xref>
+         <umod:misc_notes>post-translational enzymatic myristoylation of glycine with a synthetic alkynyl-analogue of myristic acid followed by in vitro CuAAC reaction to an azido-enrichment reagent (manuscript in preparation)</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="3-phosphoglyceryl" full_name="3-phosphoglyceryl"
+      <umod:mod title="phosphoRibosyl" full_name="phosphate-ribosylation"
                 username_of_poster="BThomas"
                 group_of_poster=""
-                date_time_posted="2013-08-05 10:54:22"
-                date_time_modified="2013-11-01 16:34:45"
+                date_time_posted="2012-09-19 14:16:08"
+                date_time_modified="2012-09-23 17:07:33"
                 approved="0"
-                record_id="1387">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
+                record_id="1356">
+         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:delta mono_mass="167.982375" avge_mass="168.0420" composition="H(5) C(3) O(6) P">
-            <umod:element symbol="H" number="5"/>
-            <umod:element symbol="C" number="3"/>
-            <umod:element symbol="O" number="6"/>
+         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
+                           spec_group="3"/>
+         <umod:delta mono_mass="282.023960" avge_mass="282.1280" composition="H(9) C(5) N(5) O(7) P">
+            <umod:element symbol="H" number="9"/>
+            <umod:element symbol="C" number="5"/>
+            <umod:element symbol="N" number="5"/>
+            <umod:element symbol="O" number="7"/>
             <umod:element symbol="P" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>PMID 23908237
-
-'Functional lysine modification by an intrinsically reactive primary glycolytic metabolite.' Moellering and Cravatt (2013) Science 341 (6145) 549-53.</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/?term=23908237</umod:url>
+            <umod:text>Reanalysis of phosphoproteomics data uncovers ADP-ribosylation sites. Matic et al. (2012) Nature Methods 9, 771–772</umod:text>
+            <umod:source>Journal</umod:source>
+            <umod:url>http://www.nature.com/nmeth/journal/v9/n8/full/nmeth.2106.html</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="HN2_mustard"
-                full_name="Modification by hydroxylated mechloroethamine (HN-2)"
-                username_of_poster="vthompson"
+      <umod:mod title="azole" full_name="Formation of five membered aromatic heterocycle"
+                username_of_poster="jomcintosh"
                 group_of_poster=""
-                date_time_posted="2013-08-23 18:36:39"
-                date_time_modified="2013-09-23 11:42:40"
+                date_time_posted="2012-09-10 17:32:20"
+                date_time_modified="2012-09-15 00:33:29"
                 approved="0"
-                record_id="1388">
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Post-translational"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="3"/>
+                record_id="1355">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:delta mono_mass="101.084064" avge_mass="101.1469" composition="H(11) C(5) N O">
-            <umod:element symbol="H" number="11"/>
-            <umod:element symbol="C" number="5"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="1"/>
+         <umod:delta mono_mass="-20.026215" avge_mass="-20.0312" composition="H(-4) O(-1)">
+            <umod:element symbol="H" number="-4"/>
+            <umod:element symbol="O" number="-1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>Thompson, Vanessa R.; DeCaprio, Anthony P. "Covalent Adduction of Nitrogen Mustards to Model Protein Nucleophiles" Chem. Res. Toxicol., 2013, 26 (8), pp 1263 - 1271</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://pubs.acs.org/doi/abs/10.1021/tx400188w</umod:url>
+            <umod:text>15883371</umod:text>
+            <umod:source>PubMed PMID</umod:source>
+            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/15883371</umod:url>
+         </umod:xref>
+         <umod:xref>
+            <umod:text>8895467</umod:text>
+            <umod:source>PubMed PMID</umod:source>
+            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/8895467</umod:url>
+         </umod:xref>
+         <umod:xref>
+            <umod:text>10200165</umod:text>
+            <umod:source>PubMed PMID</umod:source>
+            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/10200165</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="NEM:2H(5)+H2O" full_name="D5 N-ethylmaleimide+water on cysteines"
-                username_of_poster="BThomas"
+      <umod:mod title="Biotin:Thermo-21911" full_name="Biotin-PEG11-maleimide"
+                username_of_poster="Jolein_Gloerich"
                 group_of_poster=""
-                date_time_posted="2012-10-16 17:45:04"
-                date_time_modified="2012-11-02 16:22:34"
+                date_time_posted="2012-06-26 17:49:31"
+                date_time_modified="2012-07-14 19:02:40"
                 approved="0"
-                record_id="1358">
+                record_id="1340">
          <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
-         <umod:delta mono_mass="148.089627" avge_mass="148.1714"
-                     composition="H(4) 2H(5) C(6) N O(3)">
-            <umod:element symbol="H" number="4"/>
-            <umod:element symbol="2H" number="5"/>
-            <umod:element symbol="C" number="6"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="3"/>
+         <umod:delta mono_mass="921.461652" avge_mass="922.0913"
+                     composition="H(71) C(41) N(5) O(16) S">
+            <umod:element symbol="H" number="71"/>
+            <umod:element symbol="C" number="41"/>
+            <umod:element symbol="N" number="5"/>
+            <umod:element symbol="O" number="16"/>
+            <umod:element symbol="S" number="1"/>
          </umod:delta>
-         <umod:alt_name>CysNEM D5 hydrolised</umod:alt_name>
+         <umod:alt_name>Thermo #21911</umod:alt_name>
          <umod:xref>
-            <umod:text>Chemistry of protein conjugation and crosslinking by Shan S. Wong, 1991</umod:text>
-            <umod:source>Book</umod:source>
-            <umod:url/>
+            <umod:text>Pierce EZ-Link Maleimide-PEG11-Biotin</umod:text>
+            <umod:source>Misc. URL</umod:source>
+            <umod:url>http://www.piercenet.com/browse.cfm?fldID=E3862D31-9A5C-4F0A-9879-F600D33BD926</umod:url>
          </umod:xref>
-         <umod:misc_notes>Lab based observation that D5 NEM hydrolyses in an analogous way to NEM</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="Crotonyl" full_name="Crotonylation" username_of_poster="unimod"
+      <umod:mod title="iodoTMT" full_name="Native iodoacetyl Tandem Mass Tag®"
+                username_of_poster="rbomgard"
                 group_of_poster=""
-                date_time_posted="2012-12-24 15:50:10"
-                date_time_modified="2012-12-24 15:50:11"
+                date_time_posted="2012-07-06 17:37:43"
+                date_time_modified="2012-07-14 19:04:35"
                 approved="0"
-                record_id="1363">
-         <umod:specificity hidden="0" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="68.026215" avge_mass="68.0740" composition="H(4) C(4) O">
-            <umod:element symbol="H" number="4"/>
-            <umod:element symbol="C" number="4"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>Identification of 67 Histone Marks and Histone Lysine Crotonylation as a New Type of Histone Modification, Tan et al., Cell 146(6) 1016–1028 2011</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1016/j.cell.2011.08.008</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="O-Et-N-diMePhospho" full_name="O-ethyl, N-dimethyl phosphate"
-                username_of_poster="lmschopfer"
-                group_of_poster=""
-                date_time_posted="2013-01-27 13:26:33"
-                date_time_modified="2013-02-07 16:50:38"
-                approved="0"
-                record_id="1364">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="135.044916" avge_mass="135.1015" composition="H(10) C(4) N O(2) P">
-            <umod:element symbol="H" number="10"/>
-            <umod:element symbol="C" number="4"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="2"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-         <umod:alt_name>tabun</umod:alt_name>
-         <umod:xref>
-            <umod:text>Carletti, Li, Li, Ekstrom, Nicolet, Loiodice, Gillon, Froment, Lockridge, Schopfer, Masson &amp; Nachon; J Am Chem Soc 130, 16011 (2008)</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url/>
-         </umod:xref>
-         <umod:misc_notes>Adduct formed upon reaction of the organophosphate tabun with the active site serine of serine esterases/proteases such as butyrylcholinestease.</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="N-dimethylphosphate" full_name="N-dimethylphosphate"
-                username_of_poster="lmschopfer"
-                group_of_poster=""
-                date_time_posted="2013-01-27 13:36:32"
-                date_time_modified="2013-02-07 16:49:12"
-                approved="0"
-                record_id="1365">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="107.013615" avge_mass="107.0483" composition="H(6) C(2) N O(2) P">
-            <umod:element symbol="H" number="6"/>
-            <umod:element symbol="C" number="2"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="2"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-         <umod:alt_name>aged tabun</umod:alt_name>
-         <umod:xref>
-            <umod:text>Carletti, Li, Li, Ekstrom, Nicolet, Loiodice, Gillon, Froment, Lockridge, Schopfer, Masson &amp; Nachon [J Am Chem Soc 130, 16011 (2008)</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url/>
-         </umod:xref>
-         <umod:misc_notes>This adduct is a consequence of hydrolysis of the initial adduct formed by tabun (aging) on the active site serine of serine esterases/proteases such as butyrylcholinesterase.</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="phosphoRibosyl" full_name="phosphate-ribosylation"
-                username_of_poster="BThomas"
-                group_of_poster=""
-                date_time_posted="2012-09-19 14:16:08"
-                date_time_modified="2015-04-29 11:15:49"
-                approved="0"
-                record_id="1356">
-         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Post-translational"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Post-translational"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="212.008590" avge_mass="212.0945" composition="H(9) C(5) O(7) P">
-            <umod:element symbol="H" number="9"/>
-            <umod:element symbol="C" number="5"/>
-            <umod:element symbol="O" number="7"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>Reanalysis of phosphoproteomics data uncovers ADP-ribosylation sites. Matic et al. (2012) Nature Methods 9, 771–772</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://www.nature.com/nmeth/journal/v9/n8/full/nmeth.2106.html</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="azole" full_name="Formation of five membered aromatic heterocycle"
-                username_of_poster="jomcintosh"
-                group_of_poster=""
-                date_time_posted="2012-09-10 17:32:20"
-                date_time_modified="2012-09-15 00:33:29"
-                approved="0"
-                record_id="1355">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Post-translational"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="-20.026215" avge_mass="-20.0312" composition="H(-4) O(-1)">
-            <umod:element symbol="H" number="-4"/>
-            <umod:element symbol="O" number="-1"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>15883371</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/15883371</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>8895467</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/8895467</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>10200165</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/10200165</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Biotin:Thermo-21911" full_name="Biotin-PEG11-maleimide"
-                username_of_poster="Jolein_Gloerich"
-                group_of_poster=""
-                date_time_posted="2012-06-26 17:49:31"
-                date_time_modified="2012-07-14 19:02:40"
-                approved="0"
-                record_id="1340">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="921.461652" avge_mass="922.0913"
-                     composition="H(71) C(41) N(5) O(16) S">
-            <umod:element symbol="H" number="71"/>
-            <umod:element symbol="C" number="41"/>
-            <umod:element symbol="N" number="5"/>
-            <umod:element symbol="O" number="16"/>
-            <umod:element symbol="S" number="1"/>
-         </umod:delta>
-         <umod:alt_name>Thermo #21911</umod:alt_name>
-         <umod:xref>
-            <umod:text>Pierce EZ-Link Maleimide-PEG11-Biotin</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.piercenet.com/browse.cfm?fldID=E3862D31-9A5C-4F0A-9879-F600D33BD926</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="iodoTMT" full_name="Native iodoacetyl Tandem Mass Tag®"
-                username_of_poster="rbomgard"
-                group_of_poster=""
-                date_time_posted="2012-07-06 17:37:43"
-                date_time_modified="2015-04-20 16:12:53"
-                approved="0"
-                record_id="1341">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="5"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
-                           spec_group="4"/>
-         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="324.216141" avge_mass="324.4185" composition="H(28) C(16) N(4) O(3)">
-            <umod:element symbol="H" number="28"/>
-            <umod:element symbol="C" number="16"/>
-            <umod:element symbol="N" number="4"/>
-            <umod:element symbol="O" number="3"/>
-         </umod:delta>
-         <umod:alt_name>iodoTMTzero</umod:alt_name>
-         <umod:alt_name>iodoTMT0</umod:alt_name>
-         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
-         <umod:xref>
-            <umod:text>John.C.Rogers@thermo.com</umod:text>
-            <umod:source>Other</umod:source>
-            <umod:url/>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Tandem Mass Tag Reagents, Cysteine-Reactive</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.lifetechnologies.com/order/catalog/product/90100</umod:url>
-         </umod:xref>
-         <umod:misc_notes>This modification describes the native iodoTMT Reagent without isotopic label. Upon CID, this reagent releases a reporter ion of 126.127725(monoisotopic mass).</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="iodoTMT6plex" full_name="Sixplex iodoacetyl Tandem Mass Tag®"
-                username_of_poster="rbomgard"
-                group_of_poster=""
-                date_time_posted="2012-07-06 17:43:59"
-                date_time_modified="2015-04-20 16:13:35"
-                approved="0"
-                record_id="1342">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="5"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
-                           spec_group="4"/>
-         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="329.226595" avge_mass="329.3825"
-                     composition="H(28) C(12) 13C(4) N(3) 15N O(3)">
-            <umod:element symbol="H" number="28"/>
-            <umod:element symbol="C" number="12"/>
-            <umod:element symbol="13C" number="4"/>
-            <umod:element symbol="N" number="3"/>
-            <umod:element symbol="15N" number="1"/>
-            <umod:element symbol="O" number="3"/>
-         </umod:delta>
-         <umod:alt_name>iodoTMTsixplex</umod:alt_name>
-         <umod:alt_name>iodoTMT6</umod:alt_name>
-         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
-         <umod:xref>
-            <umod:text>John.C.Rogers@thermo.com</umod:text>
-            <umod:source>Other</umod:source>
-            <umod:url/>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Tandem Mass Tag Reagents, Cysteine-Reactive</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.lifetechnologies.com/order/catalog/product/90102</umod:url>
-         </umod:xref>
-         <umod:misc_notes>This modification describes the native iodoTMT Reagent without isotopic label. Upon CID, this reagent releases a reporter ions of 126.127725, 127.124760, 128.134433, 129.131468, 130.141141, and 131.138176 (monoisotopic mass).</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="Label:13C(2)15N(2)" full_name="13C(2) 15N(2)"
-                username_of_poster="rbomgard"
-                group_of_poster=""
-                date_time_posted="2015-05-15 22:30:48"
-                date_time_modified="2015-05-24 18:09:48"
-                approved="0"
-                record_id="1787">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:delta mono_mass="4.000780" avge_mass="3.9721" composition="C(-2) 13C(2) N(-2) 15N(2)">
-            <umod:element symbol="C" number="-2"/>
-            <umod:element symbol="13C" number="2"/>
-            <umod:element symbol="N" number="-2"/>
-            <umod:element symbol="15N" number="2"/>
-         </umod:delta>
-         <umod:alt_name>K4</umod:alt_name>
-         <umod:misc_notes>For SILAC experiments</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="Phosphogluconoylation" full_name="Phosphogluconoylation"
-                username_of_poster="gwadams"
-                group_of_poster=""
-                date_time_posted="2012-07-13 14:40:15"
-                date_time_modified="2013-05-22 10:55:37"
-                approved="0"
-                record_id="1344">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term"
-                           classification="Post-translational"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="258.014069" avge_mass="258.1199" composition="H(11) C(6) O(9) P">
-            <umod:element symbol="H" number="11"/>
-            <umod:element symbol="C" number="6"/>
-            <umod:element symbol="O" number="9"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>ABRF Delta Mass</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.abrf.org/index.cfm/dm.details?DMID=275&amp;AvgMass=258&amp;Margin=0</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>18083862</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Methyl:2H(3)+Acetyl:2H(3)"
-                full_name="3-fold methylated lysine labelled with Acetyl_heavy"
-                username_of_poster="Plank"
-                group_of_poster=""
-                date_time_posted="2013-02-14 16:21:54"
-                date_time_modified="2013-02-14 16:21:54"
-                approved="0"
-                record_id="1368">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:delta mono_mass="62.063875" avge_mass="62.1002" composition="H(-2) 2H(6) C(3) O">
-            <umod:element symbol="H" number="-2"/>
-            <umod:element symbol="2H" number="6"/>
-            <umod:element symbol="C" number="3"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(1)" full_name="Hex1dHex1" username_of_poster="dfplazag"
-                group_of_poster=""
-                date_time_posted="2013-02-07 14:29:21"
-                date_time_modified="2015-05-01 15:14:17"
-                approved="0"
-                record_id="1367">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="308.110732" avge_mass="308.2818" flag="false" composition="dHex Hex">
-               <umod:element symbol="H" number="20"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="308.110732" avge_mass="308.2818" flag="false" composition="dHex Hex">
-               <umod:element symbol="H" number="20"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="308.110732" avge_mass="308.2818" composition="dHex Hex">
-            <umod:element symbol="H" number="20"/>
-            <umod:element symbol="C" number="12"/>
-            <umod:element symbol="O" number="9"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="methylsulfonylethyl" full_name="reaction with methyl vinyl sulfone"
-                username_of_poster="Kramerh"
-                group_of_poster=""
-                date_time_posted="2013-04-24 14:30:59"
-                date_time_modified="2013-05-02 10:13:32"
-                approved="0"
-                record_id="1380">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="106.008850" avge_mass="106.1435" composition="H(6) C(3) O(2) S">
-            <umod:element symbol="H" number="6"/>
-            <umod:element symbol="C" number="3"/>
-            <umod:element symbol="O" number="2"/>
-            <umod:element symbol="S" number="1"/>
-         </umod:delta>
-         <umod:alt_name>protein alkylation by Michael acceptor methyl vinyl sulfone</umod:alt_name>
-         <umod:xref>
-            <umod:text>Protein reactions with methyl and ethyl vinyl sulfones.</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/?term=2475130</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Label:2H(3)+Oxidation" full_name="Oxidised 2H(3) labelled Methionine"
-                username_of_poster="Plank"
-                group_of_poster=""
-                date_time_posted="2013-02-14 16:36:56"
-                date_time_modified="2013-02-22 12:39:51"
-                approved="0"
-                record_id="1370">
-         <umod:specificity hidden="1" site="M" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:delta mono_mass="19.013745" avge_mass="19.0179" composition="H(-3) 2H(3) O">
-            <umod:element symbol="H" number="-3"/>
-            <umod:element symbol="2H" number="3"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-         <umod:alt_name>SILAC</umod:alt_name>
-         <umod:xref>
-            <umod:text>Silac introduction</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.pil.sdu.dk/silac_intro.htm</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Trimethyl:2H(9)"
-                full_name="3-fold methylation with deuterated methyl groups"
-                username_of_poster="Plank"
-                group_of_poster=""
-                date_time_posted="2013-02-14 17:14:16"
-                date_time_modified="2013-02-22 12:37:25"
-                approved="0"
-                record_id="1371">
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:delta mono_mass="51.103441" avge_mass="51.1352" composition="H(-3) 2H(9) C(3)">
-            <umod:element symbol="H" number="-3"/>
-            <umod:element symbol="2H" number="9"/>
-            <umod:element symbol="C" number="3"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Acetyl:13C(2)" full_name="heavy acetylation" username_of_poster="Plank"
-                group_of_poster=""
-                date_time_posted="2013-02-14 17:24:23"
-                date_time_modified="2013-02-14 17:24:23"
-                approved="0"
-                record_id="1372">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:delta mono_mass="44.017274" avge_mass="44.0220" composition="H(2) 13C(2) O">
-            <umod:element symbol="H" number="2"/>
-            <umod:element symbol="13C" number="2"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(2)" full_name="Hex2dHex1" username_of_poster="dfplazag"
-                group_of_poster=""
-                date_time_posted="2013-04-10 14:57:30"
-                date_time_modified="2015-05-01 15:18:45"
-                approved="0"
-                record_id="1375">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="470.163556" avge_mass="470.4224" flag="false"
-                              composition="dHex Hex(2)">
-               <umod:element symbol="H" number="30"/>
-               <umod:element symbol="C" number="18"/>
-               <umod:element symbol="O" number="14"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="470.163556" avge_mass="470.4224" flag="false"
-                              composition="dHex Hex(2)">
-               <umod:element symbol="H" number="30"/>
-               <umod:element symbol="C" number="18"/>
-               <umod:element symbol="O" number="14"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="470.163556" avge_mass="470.4224" composition="dHex Hex(2)">
-            <umod:element symbol="H" number="30"/>
-            <umod:element symbol="C" number="18"/>
-            <umod:element symbol="O" number="14"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(3)" full_name="Hex3dHex1" username_of_poster="dfplazag"
-                group_of_poster=""
-                date_time_posted="2013-04-10 15:00:23"
-                date_time_modified="2015-05-01 15:24:34"
-                approved="0"
-                record_id="1376">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="632.216379" avge_mass="632.5630" flag="false"
-                              composition="dHex Hex(3)">
-               <umod:element symbol="H" number="40"/>
-               <umod:element symbol="C" number="24"/>
-               <umod:element symbol="O" number="19"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="632.216379" avge_mass="632.5630" flag="false"
-                              composition="dHex Hex(3)">
-               <umod:element symbol="H" number="40"/>
-               <umod:element symbol="C" number="24"/>
-               <umod:element symbol="O" number="19"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="632.216379" avge_mass="632.5630" composition="dHex Hex(3)">
-            <umod:element symbol="H" number="40"/>
-            <umod:element symbol="C" number="24"/>
-            <umod:element symbol="O" number="19"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(4)" full_name="Hex4dHex1" username_of_poster="dfplazag"
-                group_of_poster=""
-                date_time_posted="2013-04-10 15:01:35"
-                date_time_modified="2015-05-01 15:27:50"
-                approved="0"
-                record_id="1377">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="794.269203" avge_mass="794.7036" flag="false"
-                              composition="dHex Hex(4)">
-               <umod:element symbol="H" number="50"/>
-               <umod:element symbol="C" number="30"/>
-               <umod:element symbol="O" number="24"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="794.269203" avge_mass="794.7036" flag="false"
-                              composition="dHex Hex(4)">
-               <umod:element symbol="H" number="50"/>
-               <umod:element symbol="C" number="30"/>
-               <umod:element symbol="O" number="24"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="794.269203" avge_mass="794.7036" composition="dHex Hex(4)">
-            <umod:element symbol="H" number="50"/>
-            <umod:element symbol="C" number="30"/>
-            <umod:element symbol="O" number="24"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(5)" full_name="Hex5dHex1" username_of_poster="dfplazag"
-                group_of_poster=""
-                date_time_posted="2013-04-10 15:03:12"
-                date_time_modified="2015-05-01 15:43:12"
-                approved="0"
-                record_id="1378">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="956.322026" avge_mass="956.8442" flag="false"
-                              composition="dHex Hex(5)">
-               <umod:element symbol="H" number="60"/>
-               <umod:element symbol="C" number="36"/>
-               <umod:element symbol="O" number="29"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="956.322026" avge_mass="956.8442" flag="false"
-                              composition="dHex Hex(5)">
-               <umod:element symbol="H" number="60"/>
-               <umod:element symbol="C" number="36"/>
-               <umod:element symbol="O" number="29"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="956.322026" avge_mass="956.8442" composition="dHex Hex(5)">
-            <umod:element symbol="H" number="60"/>
-            <umod:element symbol="C" number="36"/>
-            <umod:element symbol="O" number="29"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(6)" full_name="Hex6dHex1" username_of_poster="dfplazag"
-                group_of_poster=""
-                date_time_posted="2013-04-10 15:04:22"
-                date_time_modified="2015-05-01 15:44:11"
-                approved="0"
-                record_id="1379">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1118.374850" avge_mass="1118.9848" flag="false"
-                              composition="dHex Hex(6)">
-               <umod:element symbol="H" number="70"/>
-               <umod:element symbol="C" number="42"/>
-               <umod:element symbol="O" number="34"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1118.374850" avge_mass="1118.9848" flag="false"
-                              composition="dHex Hex(6)">
-               <umod:element symbol="H" number="70"/>
-               <umod:element symbol="C" number="42"/>
-               <umod:element symbol="O" number="34"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1118.374850" avge_mass="1118.9848" composition="dHex Hex(6)">
-            <umod:element symbol="H" number="70"/>
-            <umod:element symbol="C" number="42"/>
-            <umod:element symbol="O" number="34"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="ethylsulfonylethyl" full_name="reaction with ethyl vinyl sulfone"
-                username_of_poster="Kramerh"
-                group_of_poster=""
-                date_time_posted="2013-04-24 14:36:48"
-                date_time_modified="2013-04-26 09:25:55"
-                approved="0"
-                record_id="1381">
-         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3"/>
-         <umod:delta mono_mass="120.024500" avge_mass="120.1701" composition="H(8) C(4) O(2) S">
-            <umod:element symbol="H" number="8"/>
-            <umod:element symbol="C" number="4"/>
-            <umod:element symbol="O" number="2"/>
-            <umod:element symbol="S" number="1"/>
-         </umod:delta>
-         <umod:alt_name>protein alkylation by Michael acceptor ethyl vinyl sulfone</umod:alt_name>
-         <umod:xref>
-            <umod:text>Protein reactions with methyl and ethyl vinyl sulfones.</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/2475130</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Reactions of proteins with ethyl vinyl sulfone.</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/1242713</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="phenylsulfonylethyl" full_name="reaction with phenyl vinyl sulfone"
-                username_of_poster="Kramerh"
-                group_of_poster=""
-                date_time_posted="2013-04-24 14:41:29"
-                date_time_modified="2013-04-26 09:25:21"
-                approved="0"
-                record_id="1382">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="168.024500" avge_mass="168.2129" composition="H(8) C(8) O(2) S">
-            <umod:element symbol="H" number="8"/>
-            <umod:element symbol="C" number="8"/>
-            <umod:element symbol="O" number="2"/>
-            <umod:element symbol="S" number="1"/>
-         </umod:delta>
-         <umod:alt_name>protein alkylation by Michael acceptor phenyl vinyl sulfone</umod:alt_name>
-         <umod:xref>
-            <umod:text>Aryl vinyl sulfonates and sulfones as active site-directed and mechanism-based probes for protein tyrosine phosphatases.</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/18528979</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="PyridoxalPhosphateH2"
-                full_name="PLP bound to lysine reduced by sodium borohydride (NaBH4) to create amine linkage"
-                username_of_poster="bphilmus"
-                group_of_poster=""
-                date_time_posted="2013-04-29 17:33:45"
-                date_time_modified="2013-05-03 17:30:38"
-                approved="0"
-                record_id="1383">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1">
-            <umod:misc_notes>This is a chemical derivatization of the PLP imine with sodium borohydride to reduce imine bound through lysine epsilon amine group to chemical stable amine linkage</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="231.029660" avge_mass="231.1425" composition="H(10) C(8) N O(5) P">
-            <umod:element symbol="H" number="10"/>
-            <umod:element symbol="C" number="8"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="5"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-         <umod:alt_name>Pyridoxal Phosphate reduced</umod:alt_name>
-         <umod:xref>
-            <umod:text>We are currently trying to profile the PLP proteins of various bacteria and locate their binding sites using LC-MS of trypsin treated proteins. Under these condition the PLP imine is cleaved and therefore we need to reduce the imine bond to the chemical stable amine using sodium borohydride</umod:text>
-            <umod:source>Other</umod:source>
-            <umod:url/>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Homocysteic_acid" full_name="methionine oxidation to homocysteic acid"
-                username_of_poster="mbern"
-                group_of_poster=""
-                date_time_posted="2013-05-16 20:08:11"
-                date_time_modified="2013-05-31 15:57:56"
-                approved="0"
-                record_id="1384">
-         <umod:specificity hidden="1" site="M" position="Anywhere" classification="Artefact"
-                           spec_group="1"/>
-         <umod:delta mono_mass="33.969094" avge_mass="33.9716" composition="H(-2) C(-1) O(3)">
-            <umod:element symbol="H" number="-2"/>
-            <umod:element symbol="C" number="-1"/>
-            <umod:element symbol="O" number="3"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>20169556</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/20169556</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Bern, M; Saladino, J; Sharp J.S. Rapid Communications Mass Spectrometry (2010), 24(6):768-772</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2935272/</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Hydroxamic_acid"
-                full_name="Conversion of carboxylic acid to hydroxamic acid"
-                username_of_poster="mbern"
-                group_of_poster=""
-                date_time_posted="2013-05-16 20:40:47"
-                date_time_modified="2013-05-31 15:58:22"
-                approved="0"
-                record_id="1385">
-         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Artefact"
-                           spec_group="1">
-            <umod:misc_notes>From exposure to hydroxylamine (used with TMT)</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Artefact"
-                           spec_group="1">
-            <umod:misc_notes>From exposure to hydroxylamine (used with TMT)</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="15.010899" avge_mass="15.0146" composition="H N">
-            <umod:element symbol="H" number="1"/>
-            <umod:element symbol="N" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Oxidation+NEM" full_name="N-ethylmaleimide on cysteine sulfenic acid"
-                username_of_poster="jheld"
-                group_of_poster=""
-                date_time_posted="2013-10-16 15:31:20"
-                date_time_modified="2013-11-01 16:37:00"
-                approved="0"
-                record_id="1390">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="141.042593" avge_mass="141.1247" composition="H(7) C(6) N O(3)">
-            <umod:element symbol="H" number="7"/>
-            <umod:element symbol="C" number="6"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="3"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>24103186</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="NHS-fluorescein" full_name="fluorescein-hexanoate-NHS hydrolysis"
-                username_of_poster="cgadelha"
-                group_of_poster=""
-                date_time_posted="2013-10-18 12:14:19"
-                date_time_modified="2013-11-01 16:37:42"
-                approved="0"
-                record_id="1391">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="471.131802" avge_mass="471.4581" composition="H(21) C(27) N O(7)">
-            <umod:element symbol="H" number="21"/>
-            <umod:element symbol="C" number="27"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="7"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>6-[Fluorescein-5(6)-carboxamido]hexanoic acid N-hydroxysuccinimide ester, [114616-31-8]</umod:text>
-            <umod:source>CAS Registry</umod:source>
-            <umod:url/>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="DiART6plex" full_name="Representative mass and accurate mass for 114"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2013-11-06 11:18:58"
-                date_time_modified="2016-09-22 14:39:36"
-                approved="0"
-                record_id="1392">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>Low abundance</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:delta mono_mass="217.162932" avge_mass="217.2527"
-                     composition="H(20) C(7) 13C(4) N 15N O(2)">
-            <umod:element symbol="H" number="20"/>
-            <umod:element symbol="C" number="7"/>
-            <umod:element symbol="13C" number="4"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="15N" number="1"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-         <umod:alt_name>Isobaric labeling reagent from Omic Biosystems, Inc.</umod:alt_name>
-         <umod:alt_name>AKA DiART6plex114</umod:alt_name>
-         <umod:xref>
-            <umod:text>Revival of deuterium-labeled reagents for protein quantitation, Zeng D. and Li S.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1039/b906335h</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Novel and cost-effective 6-plex isobaric tagging reagent, DiART, is effective for identification and relative quantification of complex protein mixtures using PQD fragmentation, Ramsubramaniam N. et al.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1002/jms.3249</umod:url>
-         </umod:xref>
-         <umod:misc_notes>Different tags have the same nominal mass but slightly different exact masses. Use this modification for all tags for quantitation purposes. Monoisotopic masses of the fragment ions to be quantified are 114.12827, 115.12531, 116.14082, 117.13786, 118.14752, 119.14456</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="DiART6plex115" full_name="Accurate mass for DiART6plex 115"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2013-11-06 11:34:33"
-                date_time_modified="2013-11-06 11:34:33"
-                approved="0"
-                record_id="1393">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>Low abundance</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="217.156612" avge_mass="217.2535"
-                     composition="H(20) C(8) 13C(3) 15N(2) O(2)">
-            <umod:element symbol="H" number="20"/>
-            <umod:element symbol="C" number="8"/>
-            <umod:element symbol="13C" number="3"/>
-            <umod:element symbol="15N" number="2"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-         <umod:alt_name>Isobaric labeling reagent from Omic Biosystems, Inc.</umod:alt_name>
-         <umod:xref>
-            <umod:text>Revival of deuterium-labeled reagents for protein quantitation, Zeng D. and Li S.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1039/b906335h</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Novel and cost-effective 6-plex isobaric tagging reagent, DiART, is effective for identification and relative quantification of complex protein mixtures using PQD fragmentation, Ramsubramaniam N. et al.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1002/jms.3249</umod:url>
-         </umod:xref>
-         <umod:misc_notes>Different tags have the same nominal mass but slightly different exact masses.</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="DiART6plex116/119" full_name="Accurate mass for DiART6plex 116 and 119"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2013-11-06 11:35:52"
-                date_time_modified="2013-11-06 11:38:53"
-                approved="0"
-                record_id="1394">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>Low abundance</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:delta mono_mass="217.168776" avge_mass="217.2797"
-                     composition="H(18) 2H(2) C(9) 13C(2) N 15N O(2)">
-            <umod:element symbol="H" number="18"/>
-            <umod:element symbol="2H" number="2"/>
-            <umod:element symbol="C" number="9"/>
-            <umod:element symbol="13C" number="2"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="15N" number="1"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-         <umod:alt_name>Isobaric labeling reagent from Omic Biosystems, Inc.</umod:alt_name>
-         <umod:xref>
-            <umod:text>Novel and cost-effective 6-plex isobaric tagging reagent, DiART, is effective for identification and relative quantification of complex protein mixtures using PQD fragmentation, Ramsubramaniam N. et al.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1002/jms.3249</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Revival of deuterium-labeled reagents for protein quantitation, Zeng D. and Li S.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1039/b906335h</umod:url>
-         </umod:xref>
-         <umod:misc_notes>Different tags have the same nominal mass but slightly different exact masses.</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="DiART6plex117" full_name="Accurate mass for DiART6plex 117"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2013-11-06 11:40:01"
-                date_time_modified="2013-11-06 11:40:01"
-                approved="0"
-                record_id="1395">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>Low abundance</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="217.162456" avge_mass="217.2805"
-                     composition="H(18) 2H(2) C(10) 13C 15N(2) O(2)">
-            <umod:element symbol="H" number="18"/>
-            <umod:element symbol="2H" number="2"/>
-            <umod:element symbol="C" number="10"/>
-            <umod:element symbol="13C" number="1"/>
-            <umod:element symbol="15N" number="2"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-         <umod:alt_name>Isobaric labeling reagent from Omic Biosystems, Inc.</umod:alt_name>
-         <umod:xref>
-            <umod:text>Revival of deuterium-labeled reagents for protein quantitation, Zeng D. and Li S.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1039/b906335h</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Novel and cost-effective 6-plex isobaric tagging reagent, DiART, is effective for identification and relative quantification of complex protein mixtures using PQD fragmentation, Ramsubramaniam N. et al.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1002/jms.3249</umod:url>
-         </umod:xref>
-         <umod:misc_notes>Different tags have the same nominal mass but slightly different exact masses.</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="DiART6plex118" full_name="Accurate mass for DiART6plex 118"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2013-11-06 11:40:58"
-                date_time_modified="2013-11-06 11:40:58"
-                approved="0"
-                record_id="1396">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="N-term" position="Protein N-term"
-                           classification="Isotopic label"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Isotopic label"
-                           spec_group="4">
-            <umod:misc_notes>Low abundance</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="217.175096" avge_mass="217.2790"
-                     composition="H(18) 2H(2) C(8) 13C(3) N(2) O(2)">
-            <umod:element symbol="H" number="18"/>
-            <umod:element symbol="2H" number="2"/>
-            <umod:element symbol="C" number="8"/>
-            <umod:element symbol="13C" number="3"/>
-            <umod:element symbol="N" number="2"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-         <umod:alt_name>Isobaric labeling reagent from Omic Biosystems, Inc.</umod:alt_name>
-         <umod:xref>
-            <umod:text>Revival of deuterium-labeled reagents for protein quantitation, Zeng D. and Li S.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1039/b906335h</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Novel and cost-effective 6-plex isobaric tagging reagent, DiART, is effective for identification and relative quantification of complex protein mixtures using PQD fragmentation, Ramsubramaniam N. et al.</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1002/jms.3249</umod:url>
-         </umod:xref>
-         <umod:misc_notes>Different tags have the same nominal mass but slightly different exact masses.</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="Iodoacetanilide" full_name="iodoacetanilide derivative"
-                username_of_poster="kcook123"
-                group_of_poster=""
-                date_time_posted="2013-12-10 04:26:07"
-                date_time_modified="2014-03-01 17:35:50"
-                approved="0"
-                record_id="1397">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Artefact"
-                           spec_group="3"/>
-         <umod:delta mono_mass="133.052764" avge_mass="133.1473" composition="H(7) C(8) N O">
-            <umod:element symbol="H" number="7"/>
-            <umod:element symbol="C" number="8"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>Isotope-coded, iodoacetamide-based reagent to determine individual cysteine pK(a) values by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://www.sciencedirect.com/science/article/pii/S0003269707007907</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Iodoacetanilide:13C(6)"
-                full_name="13C labelled iodoacetanilide derivative"
-                username_of_poster="kcook123"
-                group_of_poster=""
-                date_time_posted="2013-12-10 04:31:00"
-                date_time_modified="2014-03-01 17:36:23"
-                approved="0"
-                record_id="1398">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Artefact"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Artefact"
-                           spec_group="3"/>
-         <umod:delta mono_mass="139.072893" avge_mass="139.1032" composition="H(7) C(2) 13C(6) N O">
-            <umod:element symbol="H" number="7"/>
-            <umod:element symbol="C" number="2"/>
-            <umod:element symbol="13C" number="6"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>Isotope-coded, iodoacetamide-based reagent to determine individual cysteine pK(a) values by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://www.sciencedirect.com/science/article/pii/S0003269707007907</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Dap-DSP" full_name="Diaminopimelic acid-DSP monolinked"
-                username_of_poster="grigorios"
-                group_of_poster=""
-                date_time_posted="2014-02-20 11:23:24"
-                date_time_modified="2017-01-18 11:57:11"
-                approved="0"
-                record_id="1399">
-         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Non-standard residue"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="A" position="Anywhere" classification="Non-standard residue"
-                           spec_group="1"/>
-         <umod:delta mono_mass="328.055148" avge_mass="328.4071"
-                     composition="H(16) C(13) N(2) O(4) S(2)">
-            <umod:element symbol="H" number="16"/>
-            <umod:element symbol="C" number="13"/>
-            <umod:element symbol="N" number="2"/>
-            <umod:element symbol="O" number="4"/>
-            <umod:element symbol="S" number="2"/>
-         </umod:delta>
-         <umod:alt_name>Xlink</umod:alt_name>
-         <umod:xref>
-            <umod:text>Cross-linking of the proteins in the outer membrane of Escherichia coli</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/322714?dopt=AbstractPlus</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Sigma DAP data sheet</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.sigmaaldrich.com/catalog/product/sigma/07036?lang=en&amp;region=GB</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Pierce DSP data sheet</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>https://tools.thermofisher.com/content/sfs/manuals/MAN0011280_DTSSP_DSP_UG.pdf</umod:url>
-         </umod:xref>
-         <umod:misc_notes>Gram negative peptidoglycan amino acid (DAP) mono-linked to DSP</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="MurNAc" full_name="N-Acetylmuramic acid" username_of_poster="grigorios"
-                group_of_poster=""
-                date_time_posted="2014-02-20 12:47:46"
-                date_time_modified="2015-05-01 13:37:45"
-                approved="0"
-                record_id="1400">
-         <umod:specificity hidden="1" site="A" position="Anywhere" classification="Other glycosylation"
-                           spec_group="1"/>
-         <umod:delta mono_mass="275.100502" avge_mass="275.2552" composition="O(-1) NeuAc">
-            <umod:element symbol="H" number="17"/>
-            <umod:element symbol="C" number="11"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="7"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>10597-89-4</umod:text>
-            <umod:source>CAS Registry</umod:source>
-            <umod:url/>
-         </umod:xref>
-         <umod:misc_notes>Gram negative peptidoglycan saccharide amide bonded to Alanine</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="EEEDVIEVYQEQTGG"
-                full_name="Sumoylation by SUMO-1 after Cyanogen bromide (CNBr) cleavage"
-                username_of_poster="vogelw"
-                group_of_poster=""
-                date_time_posted="2014-06-25 15:15:44"
-                date_time_modified="2014-08-08 11:37:51"
-                approved="0"
-                record_id="1405">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="1705.731890" avge_mass="1706.7153"
-                     composition="H(107) C(72) N(17) O(31)">
-            <umod:element symbol="H" number="107"/>
-            <umod:element symbol="C" number="72"/>
-            <umod:element symbol="N" number="17"/>
-            <umod:element symbol="O" number="31"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Label:2H(7)15N(4)" full_name="Label:2H(7)15N(4)"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-04-16 12:16:45"
-                date_time_modified="2014-04-16 12:16:45"
-                approved="0"
-                record_id="1402">
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:delta mono_mass="11.032077" avge_mass="11.0168"
-                     composition="H(-7) 2H(7) N(-4) 15N(4)">
-            <umod:element symbol="H" number="-7"/>
-            <umod:element symbol="2H" number="7"/>
-            <umod:element symbol="N" number="-4"/>
-            <umod:element symbol="15N" number="4"/>
-         </umod:delta>
-         <umod:alt_name>Cambridge Isotopes DNLM-7543-PK</umod:alt_name>
-         <umod:xref>
-            <umod:text>Cambridge Isotopes DNLM-7543-PK</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://shop.isotope.com/productdetails.aspx?id=10032309&amp;itemno=DNLM-7543-PK</umod:url>
-         </umod:xref>
-         <umod:misc_notes>For SILAC experiments</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="Label:2H(6)15N(1)" full_name="Label:2H(6)15N(1)"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-04-16 12:19:06"
-                date_time_modified="2014-04-16 12:19:06"
-                approved="0"
-                record_id="1403">
-         <umod:specificity hidden="1" site="P" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:delta mono_mass="7.034695" avge_mass="7.0304" composition="H(-6) 2H(6) N(-1) 15N">
-            <umod:element symbol="H" number="-6"/>
-            <umod:element symbol="2H" number="6"/>
-            <umod:element symbol="N" number="-1"/>
-            <umod:element symbol="15N" number="1"/>
-         </umod:delta>
-         <umod:alt_name>Arg-Pro conversion of Label:2H(7)15N(4)</umod:alt_name>
-         <umod:xref>
-            <umod:text>Cambridge Isotopes DNLM-7543-PK</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://shop.isotope.com/productdetails.aspx?id=10032309&amp;itemno=DNLM-7543-PK</umod:url>
-         </umod:xref>
-         <umod:misc_notes>For SILAC experiments</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="EDEDTIDVFQQQTGG"
-                full_name="Sumoylation by SUMO-2/3 after Cyanogen bromide (CNBr) cleavage"
-                username_of_poster="vogelw"
-                group_of_poster=""
-                date_time_posted="2014-06-25 15:19:11"
-                date_time_modified="2014-08-08 11:37:37"
-                approved="0"
-                record_id="1406">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1">
-            <umod:misc_notes>The cleavage products of SUMO-2 and SUMO-3 are indistinguishable</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="1662.700924" avge_mass="1663.6508"
-                     composition="H(102) C(69) N(18) O(30)">
-            <umod:element symbol="H" number="102"/>
-            <umod:element symbol="C" number="69"/>
-            <umod:element symbol="N" number="18"/>
-            <umod:element symbol="O" number="30"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Hex(5)HexNAc(4)NeuAc(2)" full_name="Hex(5) HexNAc(4) NeuAc(2)"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-07-31 13:51:41"
-                date_time_modified="2015-07-03 17:01:58"
-                approved="0"
-                record_id="1408">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="2204.772441" avge_mass="2205.9822" flag="false"
-                              composition="Hex(5) HexNAc(4) NeuAc(2)">
-               <umod:element symbol="H" number="136"/>
-               <umod:element symbol="C" number="84"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="61"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="2204.772441" avge_mass="2205.9822"
-                     composition="Hex(5) HexNAc(4) NeuAc(2)">
-            <umod:element symbol="H" number="136"/>
-            <umod:element symbol="C" number="84"/>
-            <umod:element symbol="N" number="6"/>
-            <umod:element symbol="O" number="61"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>UniCarbKB 1187</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.unicarbkb.org/structure/1187</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Hex(5)HexNAc(4)NeuAc(1)" full_name="Hex(5) HexNAc(4) NeuAc"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-07-31 13:52:20"
-                date_time_modified="2015-05-06 10:45:29"
-                approved="0"
-                record_id="1409">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1913.677025" avge_mass="1914.7277" flag="false"
-                              composition="Hex(5) HexNAc(4) NeuAc">
-               <umod:element symbol="H" number="119"/>
-               <umod:element symbol="C" number="73"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="53"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1913.677025" avge_mass="1914.7277"
-                     composition="Hex(5) HexNAc(4) NeuAc">
-            <umod:element symbol="H" number="119"/>
-            <umod:element symbol="C" number="73"/>
-            <umod:element symbol="N" number="5"/>
-            <umod:element symbol="O" number="53"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(5)HexNAc(4)NeuAc(1)" full_name="dHex Hex(5) HexNAc(4) NeuAc"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-07-31 13:53:31"
-                date_time_modified="2015-05-06 10:45:43"
-                approved="0"
-                record_id="1410">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="2059.734933" avge_mass="2060.8689" flag="false"
-                              composition="dHex Hex(5) HexNAc(4) NeuAc">
-               <umod:element symbol="H" number="129"/>
-               <umod:element symbol="C" number="79"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="57"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="2059.734933" avge_mass="2060.8689"
-                     composition="dHex Hex(5) HexNAc(4) NeuAc">
-            <umod:element symbol="H" number="129"/>
-            <umod:element symbol="C" number="79"/>
-            <umod:element symbol="N" number="5"/>
-            <umod:element symbol="O" number="57"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(5)HexNAc(4)NeuAc(2)"
-                full_name="dHex Hex(5) HexNAc(4) NeuAc(2)"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-07-31 13:53:47"
-                date_time_modified="2015-05-06 10:45:52"
-                approved="0"
-                record_id="1411">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="2350.830350" avge_mass="2352.1234" flag="false"
-                              composition="dHex Hex(5) HexNAc(4) NeuAc(2)">
-               <umod:element symbol="H" number="146"/>
-               <umod:element symbol="C" number="90"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="65"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="2350.830350" avge_mass="2352.1234"
-                     composition="dHex Hex(5) HexNAc(4) NeuAc(2)">
-            <umod:element symbol="H" number="146"/>
-            <umod:element symbol="C" number="90"/>
-            <umod:element symbol="N" number="6"/>
-            <umod:element symbol="O" number="65"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="s-GlcNAc" full_name="O3S1HexNAc1" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-08-14 15:34:42"
-                date_time_modified="2015-05-01 15:10:41"
-                approved="0"
-                record_id="1412">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="283.036187" avge_mass="283.2557" flag="false"
-                              composition="O(3) S HexNAc">
-               <umod:element symbol="H" number="13"/>
-               <umod:element symbol="C" number="8"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="8"/>
-               <umod:element symbol="S" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="283.036187" avge_mass="283.2557" flag="false"
-                              composition="O(3) S HexNAc">
-               <umod:element symbol="H" number="13"/>
-               <umod:element symbol="C" number="8"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="8"/>
-               <umod:element symbol="S" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="283.036187" avge_mass="283.2557" composition="O(3) S HexNAc">
-            <umod:element symbol="H" number="13"/>
-            <umod:element symbol="C" number="8"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="8"/>
-            <umod:element symbol="S" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="PhosphoHex(2)" full_name="H1O3P1Hex2" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-08-14 15:38:35"
-                date_time_modified="2015-05-01 15:17:26"
-                approved="0"
-                record_id="1413">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="404.071978" avge_mass="404.2611" flag="false"
-                              composition="H O(3) P Hex(2)">
-               <umod:element symbol="H" number="21"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="404.071978" avge_mass="404.2611" flag="false"
-                              composition="H O(3) P Hex(2)">
-               <umod:element symbol="H" number="21"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="404.071978" avge_mass="404.2611" flag="false"
-                              composition="H O(3) P Hex(2)">
-               <umod:element symbol="H" number="21"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="404.071978" avge_mass="404.2611" composition="H O(3) P Hex(2)">
-            <umod:element symbol="H" number="21"/>
-            <umod:element symbol="C" number="12"/>
-            <umod:element symbol="O" number="13"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Trimethyl:13C(3)2H(9)"
-                full_name="3-fold methylation with fully labelled methyl groups"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2014-09-17 09:18:49"
-                date_time_modified="2014-09-17 09:18:49"
-                approved="0"
-                record_id="1414">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Isotopic label"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="R" position="Anywhere" classification="Isotopic label"
-                           spec_group="2"/>
-         <umod:delta mono_mass="54.113505" avge_mass="54.1132" composition="H(-3) 2H(9) 13C(3)">
-            <umod:element symbol="H" number="-3"/>
-            <umod:element symbol="2H" number="9"/>
-            <umod:element symbol="13C" number="3"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="15N-oxobutanoic" full_name="Loss of ammonia (15N)"
-                username_of_poster="fufezan"
-                group_of_poster=""
-                date_time_posted="2014-11-24 13:24:53"
-                date_time_modified="2015-01-12 16:11:40"
-                approved="0"
-                record_id="1419">
-         <umod:specificity hidden="1" site="S" position="Protein N-term"
-                           classification="Post-translational"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="C" position="Any N-term" classification="Artefact"
-                           spec_group="1">
-            <umod:misc_notes>Pyro-carbamidomethyl as a delta from Carbamidomethyl-Cys</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="T" position="Protein N-term"
-                           classification="Post-translational"
-                           spec_group="3"/>
-         <umod:delta mono_mass="-18.023584" avge_mass="-18.0239" composition="H(-3) 15N(-1)">
-            <umod:element symbol="H" number="-3"/>
-            <umod:element symbol="15N" number="-1"/>
-         </umod:delta>
-         <umod:alt_name>pyruvic acid from N-term ser</umod:alt_name>
-         <umod:alt_name>oxobutanoic acid from N term Thr</umod:alt_name>
-      </umod:mod>
-      <umod:mod title="spermidine" full_name="spermidine adduct" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-01-12 16:08:04"
-                date_time_modified="2015-01-12 16:08:04"
-                approved="0"
-                record_id="1421">
-         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="128.131349" avge_mass="128.2153" composition="H(16) C(7) N(2)">
-            <umod:element symbol="H" number="16"/>
-            <umod:element symbol="C" number="7"/>
-            <umod:element symbol="N" number="2"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>Uncovering protein polyamination by the spermine‑specific
-
-antiserum and mass spectrometric analysis</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://dx.doi.org/10.1007/s00726-014-1879-8</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Biotin:Thermo-21330" full_name="Biotin_PEG4"
-                username_of_poster="rbomgard"
-                group_of_poster=""
-                date_time_posted="2015-04-20 16:08:05"
-                date_time_modified="2015-04-20 16:10:02"
-                approved="0"
-                record_id="1423">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term"
-                           classification="Chemical derivative"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="473.219571" avge_mass="473.5835"
-                     composition="H(35) C(21) N(3) O(7) S">
-            <umod:element symbol="H" number="35"/>
-            <umod:element symbol="C" number="21"/>
-            <umod:element symbol="N" number="3"/>
-            <umod:element symbol="O" number="7"/>
-            <umod:element symbol="S" number="1"/>
-         </umod:delta>
-         <umod:alt_name>NHS-PEG4-Biotin</umod:alt_name>
-         <umod:xref>
-            <umod:text>EZ-Link NHS-PEG4-Biotin Reagents</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.lifetechnologies.com/order/catalog/product/21330</umod:url>
-         </umod:xref>
-         <umod:misc_notes>also available as 21329, 21362, 21363</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="Hex(1)Pent(2)" full_name="Hex Pent(2)" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 09:37:19"
-                date_time_modified="2015-05-05 10:50:25"
-                approved="0"
-                record_id="1428">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="426.137341" avge_mass="426.3698" flag="false"
-                              composition="Pent(2) Hex">
-               <umod:element symbol="H" number="26"/>
-               <umod:element symbol="C" number="16"/>
-               <umod:element symbol="O" number="13"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="426.137341" avge_mass="426.3698" flag="false"
-                              composition="Pent(2) Hex">
-               <umod:element symbol="H" number="26"/>
-               <umod:element symbol="C" number="16"/>
-               <umod:element symbol="O" number="13"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="426.137341" avge_mass="426.3698" composition="Pent(2) Hex">
-            <umod:element symbol="H" number="26"/>
-            <umod:element symbol="C" number="16"/>
-            <umod:element symbol="O" number="13"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Pentose" full_name="Pentose" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-01 17:01:09"
-                date_time_modified="2015-05-05 10:48:17"
-                approved="0"
-                record_id="1425">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="132.042259" avge_mass="132.1146" flag="false" composition="Pent">
-               <umod:element symbol="H" number="8"/>
-               <umod:element symbol="C" number="5"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="132.042259" avge_mass="132.1146" flag="false" composition="Pent">
-               <umod:element symbol="H" number="8"/>
-               <umod:element symbol="C" number="5"/>
-               <umod:element symbol="O" number="4"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="132.042259" avge_mass="132.1146" composition="Pent">
-            <umod:element symbol="H" number="8"/>
-            <umod:element symbol="C" number="5"/>
-            <umod:element symbol="O" number="4"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Hex(1)Pent(1)" full_name="Hex Pent" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-01 17:03:00"
-                date_time_modified="2015-05-05 10:49:06"
-                approved="0"
-                record_id="1426">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="294.095082" avge_mass="294.2552" flag="false" composition="Pent Hex">
-               <umod:element symbol="H" number="18"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="294.095082" avge_mass="294.2552" flag="false" composition="Pent Hex">
-               <umod:element symbol="H" number="18"/>
-               <umod:element symbol="C" number="11"/>
-               <umod:element symbol="O" number="9"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="294.095082" avge_mass="294.2552" composition="Pent Hex">
-            <umod:element symbol="H" number="18"/>
-            <umod:element symbol="C" number="11"/>
-            <umod:element symbol="O" number="9"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Hex(1)HexA(1)" full_name="Hex HexA" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-01 17:05:51"
-                date_time_modified="2015-05-05 10:49:25"
-                approved="0"
-                record_id="1427">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="338.084912" avge_mass="338.2647" flag="false" composition="Hex HexA">
-               <umod:element symbol="H" number="18"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="11"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="338.084912" avge_mass="338.2647" flag="false" composition="Hex HexA">
-               <umod:element symbol="H" number="18"/>
-               <umod:element symbol="C" number="12"/>
-               <umod:element symbol="O" number="11"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="338.084912" avge_mass="338.2647" composition="Hex HexA">
-            <umod:element symbol="H" number="18"/>
-            <umod:element symbol="C" number="12"/>
-            <umod:element symbol="O" number="11"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Hex(1)HexNAc(1)Phos(1)" full_name="Hex HexNAc Phos"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 09:40:49"
-                date_time_modified="2015-05-06 12:07:55"
-                approved="0"
-                record_id="1429">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="445.098527" avge_mass="445.3130" flag="false"
-                              composition="H O(3) P Hex HexNAc">
-               <umod:element symbol="H" number="24"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="445.098527" avge_mass="445.3130" flag="false"
-                              composition="H O(3) P Hex HexNAc">
-               <umod:element symbol="H" number="24"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="445.098527" avge_mass="445.3130" composition="H O(3) P Hex HexNAc">
-            <umod:element symbol="H" number="24"/>
-            <umod:element symbol="C" number="14"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="13"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Hex(1)HexNAc(1)Sulf(1)" full_name="Hex HexNAc Sulf"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 09:41:48"
-                date_time_modified="2015-05-06 12:07:30"
-                approved="0"
-                record_id="1430">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="445.089011" avge_mass="445.3963" flag="false"
-                              composition="O(3) S Hex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="S" number="1"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="445.089011" avge_mass="445.3963" flag="false"
-                              composition="O(3) S Hex HexNAc">
-               <umod:element symbol="H" number="23"/>
-               <umod:element symbol="C" number="14"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="13"/>
-               <umod:element symbol="S" number="1"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="445.089011" avge_mass="445.3963" composition="O(3) S Hex HexNAc">
-            <umod:element symbol="H" number="23"/>
-            <umod:element symbol="C" number="14"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="13"/>
-            <umod:element symbol="S" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Hex(1)NeuAc(1)" full_name="Hex NeuAc" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 09:45:11"
-                date_time_modified="2015-05-05 10:51:12"
-                approved="0"
-                record_id="1431">
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="453.148240" avge_mass="453.3952" flag="false"
-                              composition="Hex NeuAc">
-               <umod:element symbol="H" number="27"/>
-               <umod:element symbol="C" number="17"/>
-               <umod:element symbol="N" number="1"/>
-               <umod:element symbol="O" number="13"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-            <umod:NeutralLoss mono_mass="453.148240" avge_mass="453.3952" flag="false"
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-                date_time_modified="2015-05-05 12:00:00"
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-                date_time_modified="2015-05-05 12:00:00"
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-                date_time_modified="2015-05-05 12:00:00"
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-                date_time_modified="2015-05-05 12:00:00"
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-                record_id="1472">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
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-            <umod:NeutralLoss mono_mass="1494.523030" avge_mass="1495.3439" flag="false"
-                              composition="dHex(1) Hex(5) HexNAc(2) Pent(1)">
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-      <umod:mod title="Hex(8)HexNAc(1)" full_name="Hex(8) HexNAc" username_of_poster="unimod"
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-                date_time_modified="2015-05-05 12:00:00"
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-               <umod:element symbol="O" number="50"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1825.660981" avge_mass="1826.6656" flag="false"
-                              composition="Hex(5) HexNAc(5)">
-               <umod:element symbol="H" number="115"/>
-               <umod:element symbol="C" number="70"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="50"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1825.660981" avge_mass="1826.6656" composition="Hex(5) HexNAc(5)">
-            <umod:element symbol="H" number="115"/>
-            <umod:element symbol="C" number="70"/>
-            <umod:element symbol="N" number="5"/>
-            <umod:element symbol="O" number="50"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(3)HexNAc(6)" full_name="dHex Hex(3) HexNAc(6)"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 12:00:00"
-                date_time_modified="2015-05-05 12:00:00"
-                approved="0"
-                record_id="1781">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1850.692615" avge_mass="1851.7181" flag="false"
-                              composition="dHex(1) Hex(3) HexNAc(6)">
-               <umod:element symbol="H" number="118"/>
-               <umod:element symbol="C" number="72"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="49"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1850.692615" avge_mass="1851.7181" flag="false"
-                              composition="dHex(1) Hex(3) HexNAc(6)">
-               <umod:element symbol="H" number="118"/>
-               <umod:element symbol="C" number="72"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="49"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1850.692615" avge_mass="1851.7181" flag="false"
-                              composition="dHex(1) Hex(3) HexNAc(6)">
-               <umod:element symbol="H" number="118"/>
-               <umod:element symbol="C" number="72"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="49"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1850.692615" avge_mass="1851.7181"
-                     composition="dHex(1) Hex(3) HexNAc(6)">
-            <umod:element symbol="H" number="118"/>
-            <umod:element symbol="C" number="72"/>
-            <umod:element symbol="N" number="6"/>
-            <umod:element symbol="O" number="49"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(4)HexNAc(4)NeuAc(1)" full_name="dHex Hex(4) HexNAc(4) NeuAc"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 12:00:00"
-                date_time_modified="2015-05-05 12:00:00"
-                approved="0"
-                record_id="1782">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1897.682110" avge_mass="1898.7283" flag="false"
-                              composition="dHex(1) Hex(4) HexNAc(4) NeuAc(1)">
-               <umod:element symbol="H" number="119"/>
-               <umod:element symbol="C" number="73"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1897.682110" avge_mass="1898.7283" flag="false"
-                              composition="dHex(1) Hex(4) HexNAc(4) NeuAc(1)">
-               <umod:element symbol="H" number="119"/>
-               <umod:element symbol="C" number="73"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1897.682110" avge_mass="1898.7283" flag="false"
-                              composition="dHex(1) Hex(4) HexNAc(4) NeuAc(1)">
-               <umod:element symbol="H" number="119"/>
-               <umod:element symbol="C" number="73"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1897.682110" avge_mass="1898.7283"
-                     composition="dHex(1) Hex(4) HexNAc(4) NeuAc(1)">
-            <umod:element symbol="H" number="119"/>
-            <umod:element symbol="C" number="73"/>
-            <umod:element symbol="N" number="5"/>
-            <umod:element symbol="O" number="52"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(3)Hex(4)HexNAc(4)" full_name="dHex(3) Hex(4) HexNAc(4)"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 12:00:00"
-                date_time_modified="2015-05-05 12:00:00"
-                approved="0"
-                record_id="1783">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1898.702511" avge_mass="1899.7561" flag="false"
-                              composition="dHex(3) Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="122"/>
-               <umod:element symbol="C" number="74"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1898.702511" avge_mass="1899.7561" flag="false"
-                              composition="dHex(3) Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="122"/>
-               <umod:element symbol="C" number="74"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1898.702511" avge_mass="1899.7561" flag="false"
-                              composition="dHex(3) Hex(4) HexNAc(4)">
-               <umod:element symbol="H" number="122"/>
-               <umod:element symbol="C" number="74"/>
-               <umod:element symbol="N" number="4"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1898.702511" avge_mass="1899.7561"
-                     composition="dHex(3) Hex(4) HexNAc(4)">
-            <umod:element symbol="H" number="122"/>
-            <umod:element symbol="C" number="74"/>
-            <umod:element symbol="N" number="4"/>
-            <umod:element symbol="O" number="52"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(3)HexNAc(5)NeuAc(1)" full_name="dHex Hex(3) HexNAc(5) NeuAc"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 12:00:00"
-                date_time_modified="2015-05-05 12:00:00"
-                approved="0"
-                record_id="1784">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1938.708659" avge_mass="1939.7802" flag="false"
-                              composition="dHex(1) Hex(3) HexNAc(5) NeuAc(1)">
-               <umod:element symbol="H" number="122"/>
-               <umod:element symbol="C" number="75"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1938.708659" avge_mass="1939.7802" flag="false"
-                              composition="dHex(1) Hex(3) HexNAc(5) NeuAc(1)">
-               <umod:element symbol="H" number="122"/>
-               <umod:element symbol="C" number="75"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1938.708659" avge_mass="1939.7802" flag="false"
-                              composition="dHex(1) Hex(3) HexNAc(5) NeuAc(1)">
-               <umod:element symbol="H" number="122"/>
-               <umod:element symbol="C" number="75"/>
-               <umod:element symbol="N" number="6"/>
-               <umod:element symbol="O" number="52"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1938.708659" avge_mass="1939.7802"
-                     composition="dHex(1) Hex(3) HexNAc(5) NeuAc(1)">
-            <umod:element symbol="H" number="122"/>
-            <umod:element symbol="C" number="75"/>
-            <umod:element symbol="N" number="6"/>
-            <umod:element symbol="O" number="52"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="dHex(2)Hex(4)HexNAc(5)" full_name="dHex(2) Hex(4) HexNAc(5)"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2015-05-05 12:00:00"
-                date_time_modified="2015-05-05 12:00:00"
-                approved="0"
-                record_id="1785">
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1955.723975" avge_mass="1956.8074" flag="false"
-                              composition="dHex(2) Hex(4) HexNAc(5)">
-               <umod:element symbol="H" number="125"/>
-               <umod:element symbol="C" number="76"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="53"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="O-linked glycosylation"
-                           spec_group="1">
-            <umod:NeutralLoss mono_mass="1955.723975" avge_mass="1956.8074" flag="false"
-                              composition="dHex(2) Hex(4) HexNAc(5)">
-               <umod:element symbol="H" number="125"/>
-               <umod:element symbol="C" number="76"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="53"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="2">
-            <umod:NeutralLoss mono_mass="1955.723975" avge_mass="1956.8074" flag="false"
-                              composition="dHex(2) Hex(4) HexNAc(5)">
-               <umod:element symbol="H" number="125"/>
-               <umod:element symbol="C" number="76"/>
-               <umod:element symbol="N" number="5"/>
-               <umod:element symbol="O" number="53"/>
-            </umod:NeutralLoss>
-            <umod:NeutralLoss mono_mass="0.000000" avge_mass="0.0000" flag="false" composition="0"/>
-         </umod:specificity>
-         <umod:delta mono_mass="1955.723975" avge_mass="1956.8074"
-                     composition="dHex(2) Hex(4) HexNAc(5)">
-            <umod:element symbol="H" number="125"/>
-            <umod:element symbol="C" number="76"/>
-            <umod:element symbol="N" number="5"/>
-            <umod:element symbol="O" number="53"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="NQIGG" full_name="SUMOylation by Giardia lamblia"
-                username_of_poster="brunog"
-                group_of_poster=""
-                date_time_posted="2015-10-02 16:16:32"
-                date_time_modified="2015-11-01 16:20:37"
-                approved="0"
-                record_id="1799">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="469.228496" avge_mass="469.4921" composition="H(31) C(19) N(7) O(7)">
-            <umod:element symbol="H" number="31"/>
-            <umod:element symbol="C" number="19"/>
-            <umod:element symbol="N" number="7"/>
-            <umod:element symbol="O" number="7"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>A8BE94</umod:text>
-            <umod:source>Swiss-Prot</umod:source>
-            <umod:url>http://www.uniprot.org/uniprot/A8BE94</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Carboxyethylpyrrole" full_name="Carboxyethylpyrrole"
-                username_of_poster="jsc17"
-                group_of_poster=""
-                date_time_posted="2015-11-19 01:35:22"
-                date_time_modified="2016-04-06 08:03:01"
-                approved="0"
-                record_id="1800">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Other" spec_group="1"/>
-         <umod:delta mono_mass="122.036779" avge_mass="122.1213" composition="H(6) C(7) O(2)">
-            <umod:element symbol="H" number="6"/>
-            <umod:element symbol="C" number="7"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>12923198</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Fluorescein-tyramine"
-                full_name="Fluorescein-tyramine adduct by peroxidase activity"
-                username_of_poster="Hideaki"
-                group_of_poster=""
-                date_time_posted="2016-02-02 11:23:24"
-                date_time_modified="2016-04-06 08:08:06"
-                approved="0"
-                record_id="1801">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="493.116152" avge_mass="493.4637" composition="H(19) C(29) N O(7)">
-            <umod:element symbol="H" number="19"/>
-            <umod:element symbol="C" number="29"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="7"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>Conjugation of fluorescein-tyramine to a protein. The fluorescein-tyramide is covalently linked to a protein tyrosine side chain via peroxidase-mediated formation of the dityrosine adduct.</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.biosyn.com/tew/tyramide-signal-amplification.aspx</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="dHex(1)Hex(7)HexNAc(4)" full_name="Fucosylated biantennary + 2 alphaGal"
-                username_of_poster="suckau"
-                group_of_poster=""
-                date_time_posted="2016-09-05 15:52:53"
-                date_time_modified="2016-09-09 16:57:21"
-                approved="0"
-                record_id="1840">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="N-linked glycosylation"
-                           spec_group="1">
-            <umod:misc_notes>observed in monoclonal antibodies</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="2092.745164" avge_mass="2093.8955"
-                     composition="dHex Hex(7) HexNAc(4)">
-            <umod:element symbol="H" number="132"/>
-            <umod:element symbol="C" number="80"/>
-            <umod:element symbol="N" number="4"/>
-            <umod:element symbol="O" number="59"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>GlycomeDB Entry 13,423</umod:text>
-            <umod:source>Other</umod:source>
-            <umod:url>http://www.glycome-db.org/database/showStructure.action?glycomeId=13423</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>ACS Book series: "State-of-the-Art and Emerging Technologies for Therapeutic Monoclonal Antibody Characterization"rnVolume 1 - Monoclonal Antibody Therapeutics: Structure, and Regulatory Space</umod:text>
-            <umod:source>Book</umod:source>
-            <umod:url>http://pubs.acs.org/isbn/9780841230262</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>PMID:23924801 rnCorrect primary structure assessment and extensive glyco-profiling of cetuximab by a combination of intact, middle-up, middle-down and bottom-up ESI and MALDI mass spectrometry techniques.</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>http://www.ncbi.nlm.nih.gov/pubmed/23924801</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="betaFNA" full_name="beta-Funaltrexamine" username_of_poster="shartson"
-                group_of_poster=""
-                date_time_posted="2016-08-26 19:59:17"
-                date_time_modified="2017-01-31 10:02:08"
-                approved="0"
-                record_id="1839">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="2"/>
-         <umod:delta mono_mass="454.210387" avge_mass="454.5155" composition="H(30) C(25) N(2) O(6)">
-            <umod:element symbol="H" number="30"/>
-            <umod:element symbol="C" number="25"/>
-            <umod:element symbol="N" number="2"/>
-            <umod:element symbol="O" number="6"/>
-         </umod:delta>
-         <umod:xref>
-            <umod:text>Empirical Formula (Hill Notation) C25H30N2O6 · HCl</umod:text>
-            <umod:source>Other</umod:source>
-            <umod:url>http://www.sigmaaldrich.com/catalog/product/sigma/o003?lang=en&amp;region=US</umod:url>
-         </umod:xref>
-         <umod:xref>
-            <umod:text>Manglik A, et al. Crystal structure of the µ-opioid receptor bound to a morphinan antagonist. Nature. 2012 Mar 21;485(7398):321-6.  PubMed PMID: 22437502.</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3523197/</umod:url>
-         </umod:xref>
-         <umod:misc_notes>Covalently bound structure in Manglik et al.,  Fig. 1b-Fig1c. Chemical formula % Sigma catalog entry.</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="Brij58" full_name="Brij 58 synthetic polymer terminus"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-08-22 14:56:22"
-                date_time_modified="2016-08-22 16:08:02"
-                approved="0"
-                record_id="1838">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Other"
-                           spec_group="1"/>
-         <umod:delta mono_mass="224.250401" avge_mass="224.4253" composition="H(32) C(16)">
-            <umod:element symbol="H" number="32"/>
-            <umod:element symbol="C" number="16"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Brij35" full_name="Brij 35 synthetic polymer terminus"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-08-22 14:55:48"
-                date_time_modified="2016-08-22 16:07:31"
-                approved="0"
-                record_id="1837">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Other"
-                           spec_group="1"/>
-         <umod:delta mono_mass="168.187801" avge_mass="168.3190" composition="H(24) C(12)">
-            <umod:element symbol="H" number="24"/>
-            <umod:element symbol="C" number="12"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Triton" full_name="Triton synthetic polymer terminus"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-08-22 14:53:44"
-                date_time_modified="2016-08-22 16:07:45"
-                approved="0"
-                record_id="1836">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Other"
-                           spec_group="2">
-            <umod:misc_notes>Triton X-114</umod:misc_notes>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Other"
-                           spec_group="1">
-            <umod:misc_notes>Triton X-100</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="188.156501" avge_mass="188.3086" composition="H(20) C(14)">
-            <umod:element symbol="H" number="20"/>
-            <umod:element symbol="C" number="14"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Tween80" full_name="Tween 80 synthetic polymer terminus"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-08-22 14:52:52"
-                date_time_modified="2016-08-22 16:08:10"
-                approved="0"
-                record_id="1835">
-         <umod:specificity hidden="1" site="C-term" position="Any C-term" classification="Other"
-                           spec_group="1"/>
-         <umod:delta mono_mass="263.237491" avge_mass="263.4381" composition="H(31) C(18) O">
-            <umod:element symbol="H" number="31"/>
-            <umod:element symbol="C" number="18"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Tween20" full_name="Tween 20 synthetic polymer terminus"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-08-22 14:51:41"
-                date_time_modified="2016-08-22 16:07:18"
-                approved="0"
-                record_id="1834">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Other"
-                           spec_group="1"/>
-         <umod:delta mono_mass="165.164326" avge_mass="165.2951" composition="H(21) C(12)">
-            <umod:element symbol="H" number="21"/>
-            <umod:element symbol="C" number="12"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Tris"
-                full_name="tris adduct causes 104 Da addition at asparagine-succinimide intermediate"
-                username_of_poster="pradeepnpraveen"
-                group_of_poster=""
-                date_time_posted="2016-08-04 12:54:25"
-                date_time_modified="2016-09-23 13:48:56"
-                approved="0"
-                record_id="1831">
-         <umod:specificity hidden="1" site="N" position="Anywhere" classification="Artefact"
-                           spec_group="1">
-            <umod:misc_notes>NG sequence specifically after deamidation - Deamidated Asparagine with adjacent glycine are prone for this modification.</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="104.071154" avge_mass="104.1277" composition="H(10) C(4) N O(2)">
-            <umod:element symbol="H" number="10"/>
-            <umod:element symbol="C" number="4"/>
-            <umod:element symbol="N" number="1"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-         <umod:alt_name>tris adduct at asparagine</umod:alt_name>
-         <umod:alt_name>tris adduct at IgG causes 104 Da addition</umod:alt_name>
-         <umod:xref>
-            <umod:text>JASMS  27(10), 1677–1685 (2016)</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://link.springer.com/article/10.1007/s13361-016-1447-4</umod:url>
-         </umod:xref>
-      </umod:mod>
-      <umod:mod title="Biotin-tyramide" full_name="Biotin-Phenol" username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-08-04 08:05:43"
-                date_time_modified="2016-08-04 08:05:43"
-                approved="0"
-                record_id="1830">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Chemical derivative"
+                record_id="1341">
+         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
+                           spec_group="4"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
+                           spec_group="5"/>
+         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
+                           spec_group="3"/>
+         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
                            spec_group="1"/>
-         <umod:delta mono_mass="361.146012" avge_mass="361.4585"
-                     composition="H(23) C(18) N(3) O(3) S">
-            <umod:element symbol="H" number="23"/>
-            <umod:element symbol="C" number="18"/>
-            <umod:element symbol="N" number="3"/>
+         <umod:delta mono_mass="324.216141" avge_mass="324.4185" composition="H(28) C(16) N(4) O(3)">
+            <umod:element symbol="H" number="28"/>
+            <umod:element symbol="C" number="16"/>
+            <umod:element symbol="N" number="4"/>
             <umod:element symbol="O" number="3"/>
-            <umod:element symbol="S" number="1"/>
          </umod:delta>
+         <umod:alt_name>iodoTMT0</umod:alt_name>
+         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
+         <umod:alt_name>iodoTMTzero</umod:alt_name>
          <umod:xref>
-            <umod:text>Iris Biothech GmbH LS-3500</umod:text>
+            <umod:text>Tandem Mass Tag Reagents, Cysteine-Reactive</umod:text>
             <umod:source>Misc. URL</umod:source>
-            <umod:url>http://www.iris-biotech.de/ls-3500</umod:url>
+            <umod:url>http://www.piercenet.com/browse.cfm?fldID=CB4C02C4-5056-8A76-4EF8-D72D59A2EAB9&amp;WT.mc_id=NewProdFP</umod:url>
          </umod:xref>
-      </umod:mod>
-      <umod:mod title="LRGG+dimethyl" full_name="LeudimethylArgGlyGly"
-                username_of_poster="bkatja"
-                group_of_poster=""
-                date_time_posted="2016-07-27 16:20:40"
-                date_time_modified="2016-09-23 13:43:57"
-                approved="0"
-                record_id="1829">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="411.259403" avge_mass="411.4991" composition="H(33) C(18) N(7) O(4)">
-            <umod:element symbol="H" number="33"/>
-            <umod:element symbol="C" number="18"/>
-            <umod:element symbol="N" number="7"/>
-            <umod:element symbol="O" number="4"/>
-         </umod:delta>
-         <umod:alt_name>LRGG ubiquitin remnant with dimethylated Arg</umod:alt_name>
-         <umod:misc_notes>LRGG remnant of ubiquitin remaining attached to lysine with missed cleavage due to dimethylation of arginine</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="RNPXL" full_name="Simulate peptide-RNA conjugates"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-06-05 14:23:58"
-                date_time_modified="2016-07-01 11:23:46"
-                approved="0"
-                record_id="1825">
-         <umod:specificity hidden="1" site="R" position="Any N-term" classification="Other" spec_group="2">
-            <umod:NeutralLoss mono_mass="324.035867" avge_mass="324.1813" flag="false"
-                              composition="H(13) C(9) N(2) O(9) P">
-               <umod:element symbol="H" number="13"/>
-               <umod:element symbol="C" number="9"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="9"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:specificity hidden="1" site="K" position="Any N-term" classification="Other" spec_group="1">
-            <umod:NeutralLoss mono_mass="324.035867" avge_mass="324.1813" flag="false"
-                              composition="H(13) C(9) N(2) O(9) P">
-               <umod:element symbol="H" number="13"/>
-               <umod:element symbol="C" number="9"/>
-               <umod:element symbol="N" number="2"/>
-               <umod:element symbol="O" number="9"/>
-               <umod:element symbol="P" number="1"/>
-            </umod:NeutralLoss>
-         </umod:specificity>
-         <umod:delta mono_mass="324.035867" avge_mass="324.1813"
-                     composition="H(13) C(9) N(2) O(9) P">
-            <umod:element symbol="H" number="13"/>
-            <umod:element symbol="C" number="9"/>
-            <umod:element symbol="N" number="2"/>
-            <umod:element symbol="O" number="9"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
          <umod:xref>
-            <umod:text>Photo-cross-linking and high-resolution mass spectrometry for assignment of RNRNA-binding sites in RNRNA-binding proteins</umod:text>
-            <umod:source>Journal</umod:source>
-            <umod:url>http://dx.doi.org/10.1038/nmeth.3092</umod:url>
+            <umod:text>John.C.Rogers@thermo.com</umod:text>
+            <umod:source>Other</umod:source>
+            <umod:url/>
          </umod:xref>
+         <umod:misc_notes>This modification describes the native iodoTMT Reagent without isotopic label. Upon CID, this reagent releases a reporter ion of 126.127725(monoisotopic mass).</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="GEE" full_name="transamidation of glycine ethyl ester to glutamine"
-                username_of_poster="michaelmerchant"
-                group_of_poster=""
-                date_time_posted="2016-05-12 15:56:17"
-                date_time_modified="2016-05-18 17:11:04"
-                approved="0"
-                record_id="1824">
-         <umod:specificity hidden="1" site="Q" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1">
-            <umod:misc_notes>GEE (glycine ethyl ester) is a substrate for the enzyme Factor XIII for cross-linking to fibrinogen</umod:misc_notes>
-         </umod:specificity>
-         <umod:delta mono_mass="86.036779" avge_mass="86.0892" composition="H(6) C(4) O(2)">
-            <umod:element symbol="H" number="6"/>
-            <umod:element symbol="C" number="4"/>
-            <umod:element symbol="O" number="2"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Glu-&gt;pyro-Glu+Methyl" full_name="Pyro-Glu from E + Methylation"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-06-15 10:07:50"
-                date_time_modified="2016-06-15 10:07:50"
-                approved="0"
-                record_id="1826">
-         <umod:specificity hidden="1" site="E" position="Any N-term" classification="Artefact"
-                           spec_group="1"/>
-         <umod:delta mono_mass="-3.994915" avge_mass="-3.9887" composition="C O(-1)">
-            <umod:element symbol="C" number="1"/>
-            <umod:element symbol="O" number="-1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="Glu-&gt;pyro-Glu+Methyl:2H(2)13C(1)"
-                full_name="Pyro-Glu from E + Methylation Medium"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-06-15 10:30:37"
-                date_time_modified="2016-06-15 10:30:37"
-                approved="0"
-                record_id="1827">
-         <umod:specificity hidden="1" site="E" position="Any N-term" classification="Artefact"
-                           spec_group="1"/>
-         <umod:delta mono_mass="-0.979006" avge_mass="-0.9837" composition="H(-2) 2H(2) 13C O(-1)">
-            <umod:element symbol="H" number="-2"/>
-            <umod:element symbol="2H" number="2"/>
-            <umod:element symbol="13C" number="1"/>
-            <umod:element symbol="O" number="-1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="LRGG+methyl" full_name="LeumethylArgGlyGly" username_of_poster="bkatja"
-                group_of_poster=""
-                date_time_posted="2016-07-27 14:34:54"
-                date_time_modified="2016-09-23 13:43:32"
-                approved="0"
-                record_id="1828">
-         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="397.243753" avge_mass="397.4725" composition="H(31) C(17) N(7) O(4)">
-            <umod:element symbol="H" number="31"/>
-            <umod:element symbol="C" number="17"/>
-            <umod:element symbol="N" number="7"/>
-            <umod:element symbol="O" number="4"/>
-         </umod:delta>
-         <umod:alt_name>LRGG ubiquitin remnant with methylated Arg</umod:alt_name>
-         <umod:misc_notes>LRGG remnant of ubiquitin remaining attached to lysine with missed cleavage due to methylation of arginine</umod:misc_notes>
-      </umod:mod>
-      <umod:mod title="NP40" full_name="NP-40 synthetic polymer terminus"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2016-08-22 14:48:48"
-                date_time_modified="2016-08-22 16:07:54"
-                approved="0"
-                record_id="1833">
-         <umod:specificity hidden="1" site="N-term" position="Any N-term" classification="Other"
-                           spec_group="1"/>
-         <umod:delta mono_mass="220.182715" avge_mass="220.3505" composition="H(24) C(15) O">
-            <umod:element symbol="H" number="24"/>
-            <umod:element symbol="C" number="15"/>
-            <umod:element symbol="O" number="1"/>
-         </umod:delta>
-      </umod:mod>
-      <umod:mod title="IASD"
-                full_name="Iodoacetamide derivative of stilbene (reaction product with thiol)"
-                username_of_poster="AberdeenProteomics"
-                group_of_poster=""
-                date_time_posted="2016-08-05 12:04:02"
-                date_time_modified="2016-09-23 13:49:37"
-                approved="0"
-                record_id="1832">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:delta mono_mass="452.034807" avge_mass="452.4582"
-                     composition="H(16) C(18) N(2) O(8) S(2)">
-            <umod:element symbol="H" number="16"/>
-            <umod:element symbol="C" number="18"/>
-            <umod:element symbol="N" number="2"/>
-            <umod:element symbol="O" number="8"/>
-            <umod:element symbol="S" number="2"/>
-         </umod:delta>
-         <umod:alt_name>4-acetamido-4'-((iodoacetyl)amino)stilbene-2,2'-disulfonic acid</umod:alt_name>
-      </umod:mod>
-      <umod:mod title="Biotin:Thermo-21328" full_name="EZ-Link Sulfo-NHS-SS-Biotin"
-                username_of_poster="unimod"
+      <umod:mod title="iodoTMT6plex" full_name="Sixplex iodoacetyl Tandem Mass Tag®"
+                username_of_poster="rbomgard"
                 group_of_poster=""
-                date_time_posted="2016-11-11 10:34:53"
-                date_time_modified="2016-11-11 10:36:26"
+                date_time_posted="2012-07-06 17:43:59"
+                date_time_modified="2012-07-14 19:05:33"
                 approved="0"
-                record_id="1841">
+                record_id="1342">
+         <umod:specificity hidden="1" site="H" position="Anywhere" classification="Chemical derivative"
+                           spec_group="4"/>
          <umod:specificity hidden="1" site="K" position="Anywhere" classification="Chemical derivative"
-                           spec_group="1"/>
-         <umod:specificity hidden="1" site="N-term" position="Any N-term"
-                           classification="Chemical derivative"
+                           spec_group="5"/>
+         <umod:specificity hidden="1" site="E" position="Anywhere" classification="Chemical derivative"
+                           spec_group="3"/>
+         <umod:specificity hidden="1" site="D" position="Anywhere" classification="Chemical derivative"
                            spec_group="2"/>
-         <umod:delta mono_mass="389.090154" avge_mass="389.5564"
-                     composition="H(23) C(15) N(3) O(3) S(3)">
-            <umod:element symbol="H" number="23"/>
-            <umod:element symbol="C" number="15"/>
+         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
+                           spec_group="1"/>
+         <umod:delta mono_mass="329.226595" avge_mass="329.3825"
+                     composition="H(28) C(12) 13C(4) N(3) 15N O(3)">
+            <umod:element symbol="H" number="28"/>
+            <umod:element symbol="C" number="12"/>
+            <umod:element symbol="13C" number="4"/>
             <umod:element symbol="N" number="3"/>
+            <umod:element symbol="15N" number="1"/>
             <umod:element symbol="O" number="3"/>
-            <umod:element symbol="S" number="3"/>
          </umod:delta>
-         <umod:alt_name>also Biotin:Thermo-21331</umod:alt_name>
+         <umod:alt_name>iodoTMT6</umod:alt_name>
+         <umod:alt_name>Tandem Mass Tag® and TMT® are registered Trademarks of Proteome Sciences plc.</umod:alt_name>
+         <umod:alt_name>iodoTMTsixplex</umod:alt_name>
          <umod:xref>
-            <umod:text>Thermo data sheet</umod:text>
-            <umod:source>Misc. URL</umod:source>
-            <umod:url>https://tools.thermofisher.com/content/sfs/manuals/MAN0011183_EZ_SulfoNHS_SS_Biotin_UG.pdf</umod:url>
+            <umod:text>John.C.Rogers@thermo.com</umod:text>
+            <umod:source>Other</umod:source>
+            <umod:url/>
          </umod:xref>
-      </umod:mod>
-      <umod:mod title="PhosphoCytidine" full_name="Cytidine monophosphate"
-                username_of_poster="unimod"
-                group_of_poster=""
-                date_time_posted="2017-02-01 17:36:16"
-                date_time_modified="2017-02-02 10:16:50"
-                approved="0"
-                record_id="1843">
-         <umod:specificity hidden="1" site="Y" position="Anywhere" classification="Post-translational"
-                           spec_group="3"/>
-         <umod:specificity hidden="1" site="T" position="Anywhere" classification="Post-translational"
-                           spec_group="2"/>
-         <umod:specificity hidden="1" site="S" position="Anywhere" classification="Post-translational"
-                           spec_group="1"/>
-         <umod:delta mono_mass="305.041287" avge_mass="305.1812"
-                     composition="H(12) C(9) N(3) O(7) P">
-            <umod:element symbol="H" number="12"/>
-            <umod:element symbol="C" number="9"/>
-            <umod:element symbol="N" number="3"/>
-            <umod:element symbol="O" number="7"/>
-            <umod:element symbol="P" number="1"/>
-         </umod:delta>
-         <umod:alt_name>CMP</umod:alt_name>
          <umod:xref>
-            <umod:text>Nature Chemical Biology 5, 378 - 379 (2009)</umod:text>
+            <umod:text>Tandem Mass Tag Reagents, Cysteine-Reactive</umod:text>
             <umod:source>Misc. URL</umod:source>
-            <umod:url>dx.doi.org/10.1038/nchembio0609-378</umod:url>
+            <umod:url>http://www.piercenet.com/browse.cfm?fldID=CB4C02C4-5056-8A76-4EF8-D72D59A2EAB9&amp;WT.mc_id=NewProdFP</umod:url>
          </umod:xref>
-         <umod:misc_notes>By analogy with AMP</umod:misc_notes>
+         <umod:misc_notes>This modification describes the native iodoTMT Reagent without isotopic label. Upon CID, this reagent releases a reporter ions of 126.127725, 127.124760, 128.134433, 129.131468, 130.141141, and 131.138176 (monoisotopic mass).</umod:misc_notes>
       </umod:mod>
-      <umod:mod title="AzidoF" full_name="Azidophenylalanine" username_of_poster="astridb"
+      <umod:mod title="Gluconoylation" full_name="Gluconoylation" username_of_poster="gwadams"
                 group_of_poster=""
-                date_time_posted="2017-02-17 09:53:27"
-                date_time_modified="2017-03-03 15:46:05"
+                date_time_posted="2012-07-13 14:37:01"
+                date_time_modified="2012-07-14 19:05:59"
                 approved="0"
-                record_id="1845">
-         <umod:specificity hidden="1" site="F" position="Anywhere" classification="Chemical derivative"
+                record_id="1343">
+         <umod:specificity hidden="1" site="N-term" position="Any N-term"
+                           classification="Post-translational"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:delta mono_mass="41.001397" avge_mass="41.0122" composition="H(-1) N(3)">
-            <umod:element symbol="H" number="-1"/>
-            <umod:element symbol="N" number="3"/>
+         <umod:delta mono_mass="178.047738" avge_mass="178.1400" composition="H(10) C(6) O(6)">
+            <umod:element symbol="H" number="10"/>
+            <umod:element symbol="C" number="6"/>
+            <umod:element symbol="O" number="6"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>26597962</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
+            <umod:text>ABRF Delta Mass</umod:text>
+            <umod:source>Misc. URL</umod:source>
+            <umod:url>http://www.abrf.org/index.cfm/dm.details?DMID=226&amp;AvgMass=all&amp;Margin=0</umod:url>
          </umod:xref>
       </umod:mod>
-      <umod:mod title="Dimethylaminoethyl"
-                full_name="Cys alkylation by dimethylaminoethyl halide"
-                username_of_poster="Kramerh"
+      <umod:mod title="Phosphogluconoylation" full_name="Phosphogluconoylation"
+                username_of_poster="gwadams"
                 group_of_poster=""
-                date_time_posted="2017-02-17 16:10:59"
-                date_time_modified="2017-03-03 15:50:09"
+                date_time_posted="2012-07-13 14:40:15"
+                date_time_modified="2012-07-14 19:06:34"
                 approved="0"
-                record_id="1846">
-         <umod:specificity hidden="1" site="C" position="Anywhere" classification="Chemical derivative"
+                record_id="1344">
+         <umod:specificity hidden="1" site="N-term" position="Any N-term"
+                           classification="Post-translational"
+                           spec_group="2"/>
+         <umod:specificity hidden="1" site="K" position="Anywhere" classification="Post-translational"
                            spec_group="1"/>
-         <umod:delta mono_mass="71.073499" avge_mass="71.1210" composition="H(9) C(4) N">
-            <umod:element symbol="H" number="9"/>
-            <umod:element symbol="C" number="4"/>
-            <umod:element symbol="N" number="1"/>
+         <umod:delta mono_mass="258.014069" avge_mass="258.1199" composition="H(11) C(6) O(9) P">
+            <umod:element symbol="H" number="11"/>
+            <umod:element symbol="C" number="6"/>
+            <umod:element symbol="O" number="9"/>
+            <umod:element symbol="P" number="1"/>
          </umod:delta>
          <umod:xref>
-            <umod:text>20373501</umod:text>
-            <umod:source>PubMed PMID</umod:source>
-            <umod:url/>
+            <umod:text>ABRF Delta Mass</umod:text>
+            <umod:source>Misc. URL</umod:source>
+            <umod:url>http://www.abrf.org/index.cfm/dm.details?DMID=275&amp;AvgMass=258&amp;Margin=0</umod:url>
          </umod:xref>
       </umod:mod>
    </umod:modifications>
@@ -38256,14 +23206,6 @@ antiserum and mass spectrometric analysis</umod:text>
          <umod:element symbol="H" number="1"/>
          <umod:element symbol="O" number="1"/>
       </umod:aa>
-      <umod:aa title="U" three_letter="Sec" full_name="Selenocysteine" mono_mass="150.953633"
-               avge_mass="150.0379">
-         <umod:element symbol="H" number="5"/>
-         <umod:element symbol="C" number="3"/>
-         <umod:element symbol="N" number="1"/>
-         <umod:element symbol="O" number="1"/>
-         <umod:element symbol="Se" number="1"/>
-      </umod:aa>
    </umod:amino_acids>
    <umod:mod_bricks>
       <umod:brick title="-" full_name="" mono_mass="0" avge_mass="0"/>
@@ -38324,7 +23266,7 @@ antiserum and mass spectrometric analysis</umod:text>
          <umod:element symbol="H" number="10"/>
          <umod:element symbol="O" number="4"/>
       </umod:brick>
-      <umod:brick title="HexA" full_name="Hexuronic acid" mono_mass="176.03208806"
+      <umod:brick title="HexA" full_name="Hexosamine" mono_mass="176.03208806"
                   avge_mass="176.12412">
          <umod:element symbol="C" number="6"/>
          <umod:element symbol="H" number="8"/>
@@ -38462,12 +23404,5 @@ antiserum and mass spectrometric analysis</umod:text>
       <umod:brick title="Pd" full_name="Palladium" mono_mass="105.903478" avge_mass="106.42">
          <umod:element symbol="Pd" number="1"/>
       </umod:brick>
-      <umod:brick title="HexN" full_name="Hexosamine" mono_mass="161.068807905"
-                  avge_mass="161.15583999999998">
-         <umod:element symbol="H" number="11"/>
-         <umod:element symbol="C" number="6"/>
-         <umod:element symbol="O" number="4"/>
-         <umod:element symbol="N" number="1"/>
-      </umod:brick>
    </umod:mod_bricks>
-</umod:unimod>
\ No newline at end of file
+</umod:unimod>
diff --git a/pwiz_tools/Skyline/Executables/UniModCompiler/Program.cs b/pwiz_tools/Skyline/Executables/UniModCompiler/Program.cs
index 9128da5bc4..e1dbbfc285 100644
--- a/pwiz_tools/Skyline/Executables/UniModCompiler/Program.cs
+++ b/pwiz_tools/Skyline/Executables/UniModCompiler/Program.cs
@@ -22,7 +22,6 @@
 using System.Linq;
 using System.IO;
 using System.Xml.Serialization;
-using pwiz.Common.Chemistry;
 
 namespace UniModCompiler
 {
@@ -45,9 +44,6 @@ class Program
         private static List<Mod> _listedHiddenMods;
         private static List<string> _impossibleMods;
         private static Dictionary<string, ThreeLetterCodeUsed> _dictModNameToThreeLetterCode;
-        private static readonly MassDistribution EmptyMassDistribution = new MassDistribution(.001, .00001);
-        private static readonly IsotopeAbundances IsotopeAbundances = GetIsotopeAbundances();
-        private static Dictionary<Mod, int> _requiredPrecisions;
 
         private class ThreeLetterCodeUsed
         {
@@ -128,8 +124,6 @@ static void Main()
                     }
                 }
 
-                _requiredPrecisions = GetRequiredPrecisions(3);
-
                 _impossibleMods = new List<string>();
 
                 // Writing the output file.
@@ -381,7 +375,7 @@ private static IEnumerable<Mod> ReadListedMods(StreamReader reader)
             }
             return listedMods;
         }
-
+              
         /// <summary>
         /// Search for the listed modifications within the XML modifications, and write matches to the C# file.
         /// </summary>
@@ -491,11 +485,7 @@ private static void WriteMods(StreamWriter writer, bool hidden, bool isotopic)
                         }
                     }
                 }
-                writer.Write("Hidden = {0}, ", hidden.ToString().ToLower());
-                int precisionRequired;
-                if (!_requiredPrecisions.TryGetValue(mod, out precisionRequired))
-                    precisionRequired = 1;
-                writer.WriteLine("PrecisionRequired = {0}", precisionRequired);
+                writer.WriteLine("Hidden = {0}, ", hidden.ToString().ToLower());
                 writer.WriteLine("            },");
 
                 
@@ -506,99 +496,6 @@ private static void WriteMods(StreamWriter writer, bool hidden, bool isotopic)
             }
         }
 
-        private static Dictionary<Mod, int> GetRequiredPrecisions(int decimalsToCheck)
-        {
-            var all = new List<Tuple<Mod, double>>();
-            foreach (var mod in _listedMods.Concat(_listedHiddenMods))
-            {
-                var dictMods = new List<mod_t>();
-                mod_t dictLookupMod;
-                if (_dictIsotopeMods.TryGetValue(mod.Title, out dictLookupMod))
-                    dictMods.Add(dictLookupMod);
-                if (_dictStructuralMods.TryGetValue(mod.Title, out dictLookupMod))
-                    dictMods.Add(dictLookupMod);
-                if (!dictMods.Any())
-                    continue;
-
-                var curMod = mod;
-                all.AddRange(from dictMod in dictMods
-                             select BuildFormula(dictMod.delta.element)
-                             into skylineFormula where skylineFormula.Length > 0
-                             select GetMassDistribution(skylineFormula)
-                             into massDistribution
-                             select massDistribution.MostAbundanceMass into monoMass
-                             select Tuple.Create(curMod, monoMass));
-            }
-
-            all.Sort((x, y) => x.Item2.CompareTo(y.Item2));
-            var precisions = new Dictionary<Mod, int>();
-            for (var i = 0; i < all.Count; i++)
-            {
-                var current = all[i];
-                var requiredLower = RequiredPrecision(current, all.Take(i).Reverse(), decimalsToCheck);
-                var requiredUpper = RequiredPrecision(current, all.Skip(i + 1), decimalsToCheck);
-                precisions[current.Item1] = Math.Max(requiredLower, requiredUpper);
-            }
-
-            return precisions;
-        }
-
-        private static int RequiredPrecision(Tuple<Mod, double> cur, IEnumerable<Tuple<Mod, double>> check, int decimalsToCheck)
-        {
-            var protein = string.Join(string.Empty, cur.Item1.AAs).Equals("Protein");
-            // find first Mod in check with at least one matching AA
-            foreach (var other in check)
-            {
-                if (protein || !cur.Item1.AAs.Any() || !other.Item1.AAs.Any() || cur.Item1.AAs.Intersect(other.Item1.AAs).Any())
-                {
-                    // find minimum amount of decimals needed to distinguish cur from other
-                    for (var i = 1; i <= decimalsToCheck; i++)
-                    {
-                        if (!ValuesEqualWithPrecision(cur.Item2, other.Item2, i))
-                            return i;
-                    }
-                    break; // not distinguishable with any amount of decimals up to limit
-                }
-            }
-            return 1;
-        }
-
-        private static bool ValuesEqualWithPrecision(double x, double y, int precision)
-        {
-            var formatString = "F0" + precision;
-            return Equals(x.ToString(formatString), y.ToString(formatString));
-        }
-
-        private static MassDistribution GetMassDistribution(string formula)
-        {
-            var md = EmptyMassDistribution;
-            var result = md;
-            Molecule moleculePlus;
-            Molecule moleculeMinus;
-            var indexMinus = formula.IndexOf("-", StringComparison.InvariantCulture);
-            if (indexMinus < 0)
-            {
-                moleculePlus = Molecule.Parse(formula.Trim());
-                moleculeMinus = Molecule.Empty;
-            }
-            else
-            {
-                moleculePlus = Molecule.Parse(formula.Substring(0, indexMinus).Trim());
-                moleculeMinus = Molecule.Parse(formula.Substring(indexMinus + 1).Trim());
-            }
-            var isotopeAbundances = IsotopeAbundances;
-            foreach (var element in moleculePlus)
-            {
-                result = result.Add(md.Add(isotopeAbundances[element.Key]).Multiply(element.Value));
-            }
-            foreach (var element in moleculeMinus)
-            {
-                result = result.Add(md.Add(isotopeAbundances[element.Key]).Multiply(-element.Value));
-            }
-            return result;
-
-        }
-
         private static bool ListEquals(List<string> list1, List<string> list2)
         {
             for (int i = 0; i < list1.Count; i++)
@@ -779,28 +676,6 @@ private static void SequenceMassCalc()
             AMINO_FORMULAS['y'] = AMINO_FORMULAS['Y'] = "C9H9O2N";
             // ReSharper restore CharImplicitlyConvertedToNumeric
         }
-
-        private static IsotopeAbundances GetIsotopeAbundances()
-        {
-            var isotopeAbundances = IsotopeAbundances.Default;
-            isotopeAbundances = isotopeAbundances.SetAbundances(
-                new Dictionary<string, MassDistribution>
-                {
-                    {"H'", SingleMass(2.014101779)},
-                    {"O\"", SingleMass(16.9991315)},
-                    {"O'", SingleMass(17.9991604)},
-                    {"N'", SingleMass(15.0001088984)},
-                    {"C'", SingleMass(13.0033548378)},
-                    {"Cl'", SingleMass(36.965902602)},
-                    {"Br'", SingleMass(80.9162897)}
-                });
-            return isotopeAbundances;
-        }
-
-        private static MassDistribution SingleMass(double mass)
-        {
-            return EmptyMassDistribution.SetAbundance(mass, 1.0);
-        }
     }
 
 }
diff --git a/pwiz_tools/Skyline/Executables/UniModCompiler/UniModTemplate.cs b/pwiz_tools/Skyline/Executables/UniModCompiler/UniModTemplate.cs
index 5de18219e4..bc3446f4b3 100644
--- a/pwiz_tools/Skyline/Executables/UniModCompiler/UniModTemplate.cs
+++ b/pwiz_tools/Skyline/Executables/UniModCompiler/UniModTemplate.cs
@@ -16,7 +16,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-// ReSharper disable NonLocalizedString
+// ReSharper disable LocalizableElement
 namespace pwiz.Skyline.Model.DocSettings
 {
     public static class UniModData
@@ -35,7 +35,7 @@ public static class UniModData
             // Hardcoded Skyline Mods
             new UniModModificationData
             {
-                 Name = "Amonia Loss (K, N, Q, R)", 
+                 Name = "Ammonia Loss (K, N, Q, R)", 
                  AAs = "K, N, Q, R", LabelAtoms = LabelAtoms.None, Losses = new [] { new FragmentLoss("NH3"), }, 
                  Structural = true, Hidden = false, 
             },
@@ -86,20 +86,7 @@ public static class UniModData
                  Name = "Label:13C(6) (C-term R)", 
                  AAs = "R", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.C13,  
                  Structural = false, Hidden = false, 
-//            },
-// NOT YET - Brendan wants to see demonstrated user need 7-21-17
-//            new UniModModificationData
-//            {
-//                 Name = "Label:37Cl", 
-//                 LabelAtoms = LabelAtoms.Cl37,  // For small molecule use
-//                 Structural = false, Hidden = false, 
-//            },
-//            new UniModModificationData
-//            {
-//                 Name = "Label:81Br", 
-//                 LabelAtoms = LabelAtoms.Br81,  // For small molecule use  
-//                 Structural = false, Hidden = false, 
-}
+            }
         };
     }
 }
\ No newline at end of file
diff --git a/pwiz_tools/Skyline/Model/DocSettings/Modification.cs b/pwiz_tools/Skyline/Model/DocSettings/Modification.cs
index 1d4d1d61f6..f72d8c6d68 100644
--- a/pwiz_tools/Skyline/Model/DocSettings/Modification.cs
+++ b/pwiz_tools/Skyline/Model/DocSettings/Modification.cs
@@ -121,14 +121,14 @@ public StaticMod(string name, string aas, ModTerminus? term, LabelAtoms labelAto
 
         public StaticMod(string name, string aas, ModTerminus? term,
             string formula, LabelAtoms labelAtoms, double? monoMass, double? avgMass)
-            : this(name, aas, term, false, formula, labelAtoms, RelativeRT.Matching, monoMass, avgMass, null, null, null, null)
+            : this(name, aas, term, false, formula, labelAtoms, RelativeRT.Matching, monoMass, avgMass, null, null, null)
         {
             
         }
 
         public StaticMod(string name, string aas, ModTerminus? term, bool isVariable, string formula,
                          LabelAtoms labelAtoms, RelativeRT relativeRT, double? monoMass, double? avgMass, IList<FragmentLoss> losses)
-            : this(name, aas, term, isVariable, formula, labelAtoms, relativeRT, monoMass, avgMass, losses, null, null, null)
+            : this(name, aas, term, isVariable, formula, labelAtoms, relativeRT, monoMass, avgMass, losses, null, null)
         {
             
         }
@@ -144,8 +144,7 @@ public StaticMod(string name,
                          double? avgMass,
                          IList<FragmentLoss> losses,
                          int? uniModId,
-                         string shortName,
-                         int? precisionRequired)
+                         string shortName)
             : base(name)
         {
             AAs = aas;
@@ -161,7 +160,6 @@ public StaticMod(string name,
 
             UnimodId = uniModId;
             ShortName = shortName;
-            _precisionRequired = precisionRequired;
 
             Validate();
         }
@@ -379,9 +377,6 @@ public bool HasLoss
 
         public string ShortName { get; private set; }
 
-        private readonly int? _precisionRequired;
-        public int PrecisionRequired { get { return _precisionRequired ?? 1; }}
-
         public CrosslinkerSettings CrosslinkerSettings { get; private set; }
 
         public MoleculeMassOffset GetMoleculeMassOffset()
diff --git a/pwiz_tools/Skyline/Model/DocSettings/UniMod.cs b/pwiz_tools/Skyline/Model/DocSettings/UniMod.cs
index 94dac881c7..6b441bd540 100644
--- a/pwiz_tools/Skyline/Model/DocSettings/UniMod.cs
+++ b/pwiz_tools/Skyline/Model/DocSettings/UniMod.cs
@@ -71,7 +71,7 @@ private static void AddMod(UniModModificationData data)
         {
             var newMod = new StaticMod(data.Name, data.AAs, data.Terminus, false, data.Formula, data.LabelAtoms,
                                        RelativeRT.Matching, null, null, data.Losses, data.ID,
-                                       data.ShortName, data.PrecisionRequired);
+                                       data.ShortName);
             if (data.ID.HasValue && data.ShortName != null)
             {
                 int id;
@@ -216,7 +216,6 @@ public struct UniModModificationData
         public int? ID { get; set; }
         public bool Structural { get; set; }
         public bool Hidden { get; set; }
-        public int? PrecisionRequired { get; set; }
         public string ShortName { get; set; }
     }
 
diff --git a/pwiz_tools/Skyline/Model/DocSettings/UniModData.cs b/pwiz_tools/Skyline/Model/DocSettings/UniModData.cs
index 8556b15de4..ceac5ea80d 100644
--- a/pwiz_tools/Skyline/Model/DocSettings/UniModData.cs
+++ b/pwiz_tools/Skyline/Model/DocSettings/UniModData.cs
@@ -34,6823 +34,6823 @@ public static class UniModData
             {
                  Name = "Acetyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "1Ac", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Ac", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Amidated (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "HN - O", ID = 2, 
-                 Structural = true, ShortName = "Ami", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "Ami", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Ammonia-loss (N-term C)", 
                  AAs = "C", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H3N", ID = 385, 
-                 Structural = true, ShortName = "dAm", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "dAm", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Biotin (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C10H14N2O2S", ID = 3, 
-                 Structural = true, ShortName = "Btn", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Btn", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Biotin (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C10H14N2O2S", ID = 3, 
-                 Structural = true, ShortName = "Btn", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Btn", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "CAM", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "CRM", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "CRM", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Carboxymethyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C2H2O2", ID = 6, 
-                 Structural = true, ShortName = "Cmc", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "Cmc", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Na (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Na - H", ID = 30, 
-                 Structural = true, ShortName = "NaX", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "NaX", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Na (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Na - H", ID = 30, 
-                 Structural = true, ShortName = "NaX", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "NaX", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "cysTMT6plex (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H25C10C'4N2N'O2S", ID = 985, 
-                 Structural = true, Hidden = false, PrecisionRequired = 2
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Deamidated (NQ)", 
                  AAs = "N, Q", LabelAtoms = LabelAtoms.None, Formula = "O - HN", ID = 7, 
-                 Structural = true, ShortName = "Dea", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dea", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Dehydrated (N-term C)", 
                  AAs = "C", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 23, 
-                 Structural = true, ShortName = "Dhy", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dhy", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Dehydro (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "-H", ID = 374, 
-                 Structural = true, ShortName = "-1H", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "-1H", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H13H'2C8NO'", ID = 1322, 
-                 Structural = true, Hidden = false, PrecisionRequired = 3
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H13H'2C8NO'", ID = 1322, 
-                 Structural = true, Hidden = false, PrecisionRequired = 2
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H13H'2C8NO'", ID = 1322, 
-                 Structural = true, Hidden = false, PrecisionRequired = 3
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ox", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Ethanolyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H4C2O", ID = 278, 
-                 Structural = true, ShortName = "EtO", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "EtO", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ExacTagAmine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H52C25C'12N8N'6O19S", ID = 741, 
-                 Structural = true, Hidden = false, PrecisionRequired = 1
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ExacTagThiol (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H50C23C'12N8N'6O18", ID = 740, 
-                 Structural = true, Hidden = false, PrecisionRequired = 1
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Formyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "CO", ID = 122, 
-                 Structural = true, ShortName = "Frm", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "Frm", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Gln->pyro-Glu (N-term Q)", 
                  AAs = "Q", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H3N", ID = 28, 
-                 Structural = true, ShortName = "PGQ", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "PGQ", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Glu->pyro-Glu (N-term E)", 
                  AAs = "E", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 27, 
-                 Structural = true, ShortName = "PGE", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "PGE", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Guanidinyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2CN2", ID = 52, 
-                 Structural = true, ShortName = "1Gu", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "1Gu", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-C (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C10H17N3O3", ID = 105, 
-                 Structural = true, ShortName = "C0I", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "C0I", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ICPL (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C6H3NO", ID = 365, 
-                 Structural = true, ShortName = "IP0", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "IP0", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ICPL:13C(6) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H3C'6NO", ID = 364, 
-                 Structural = true, ShortName = "IP6", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "IP6", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C4C'3NN'O", ID = 214, 
-                 Structural = true, ShortName = "IT4", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "IT4", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H12C4C'3NN'O", ID = 214, 
-                 Structural = true, ShortName = "IT4", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "IT4", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H12C4C'3NN'O", ID = 214, 
-                 Structural = true, ShortName = "IT4", Hidden = false, PrecisionRequired = 3
+                 Structural = true, ShortName = "IT4", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'7N'C7H24N3O3", ID = 730, 
-                 Structural = true, ShortName = "IT8", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "IT8", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'7N'C7H24N3O3", ID = 730, 
-                 Structural = true, ShortName = "IT8", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "IT8", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C'7N'C7H24N3O3", ID = 730, 
-                 Structural = true, ShortName = "IT8", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "IT8", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Met->Hse (C-term M)", 
                  AAs = "M", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "O - H2CS", ID = 10, 
-                 Structural = true, ShortName = "Hse", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hse", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Met->Hsl (C-term M)", 
                  AAs = "M", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H4CS", ID = 11, 
-                 Structural = true, ShortName = "Hsl", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hsl", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Methylthio (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H2CS", ID = 39, 
-                 Structural = true, ShortName = "MSH", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "MSH", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C7H12N2O", ID = 888, 
-                 Structural = true, ShortName = "M00", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "M00", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C7H12N2O", ID = 888, 
-                 Structural = true, ShortName = "M00", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "M00", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C7H12N2O", ID = 888, 
-                 Structural = true, ShortName = "M00", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "M00", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "NIPCAM (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H9C5NO", ID = 17, 
-                 Structural = true, Hidden = false, PrecisionRequired = 1
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (HW)", 
                  AAs = "H, W", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "O", Losses = new [] { new FragmentLoss("H4COS"), }, ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Phospho (ST)", 
                  AAs = "S, T", LabelAtoms = LabelAtoms.None, Formula = "HO3P", Losses = new [] { new FragmentLoss("H3O4P"), }, ID = 21, 
-                 Structural = true, ShortName = "Pho", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "Pho", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Phospho (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "HO3P", ID = 21, 
-                 Structural = true, ShortName = "Pho", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "Pho", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Propionamide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C3H5NO", ID = 24, 
-                 Structural = true, ShortName = "PPa", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "PPa", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Pyridylethyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C7N", ID = 31, 
-                 Structural = true, ShortName = "Pye", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pye", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Pyro-carbamidomethyl (N-term C)", 
                  AAs = "C", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C2O", ID = 26, 
-                 Structural = true, Hidden = false, PrecisionRequired = 1
+                 Structural = true, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Sulfo (STY)", 
                  AAs = "S, T, Y", LabelAtoms = LabelAtoms.None, Formula = "O3S", Losses = new [] { new FragmentLoss("O3S"), }, ID = 40, 
-                 Structural = true, ShortName = "SuO", Hidden = false, PrecisionRequired = 2
+                 Structural = true, ShortName = "SuO", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "TMT2plex (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N2O2", ID = 738, 
-                 Structural = true, ShortName = "TM2", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM2", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "TMT2plex (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N2O2", ID = 738, 
-                 Structural = true, ShortName = "TM2", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM2", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "TMT6plex (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H20C8C'4NN'O2", ID = 737, 
-                 Structural = true, ShortName = "TM6", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM6", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "TMT6plex (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H20C8C'4NN'O2", ID = 737, 
-                 Structural = true, ShortName = "TM6", Hidden = false, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM6", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-C:13C(9) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C'9 - C9", ID = 106, 
-                 Structural = false, ShortName = "C9I", Hidden = false, PrecisionRequired = 1
+                 Structural = false, ShortName = "C9I", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ICPL:13C(6)2H(4) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'6H'4 - C6H4", ID = 866, 
-                 Structural = false, Hidden = false, PrecisionRequired = 1
+                 Structural = false, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ICPL:13C(6)2H(4) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'6H'4 - C6H4", ID = 866, 
-                 Structural = false, Hidden = false, PrecisionRequired = 1
+                 Structural = false, Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "ICPL:2H(4) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 687, 
-                 Structural = false, ShortName = "IP4", Hidden = false, PrecisionRequired = 1
+                 Structural = false, ShortName = "IP4", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Label:18O(1) (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "O' - O", ID = 258, 
-                 Structural = false, ShortName = "Ob1", Hidden = false, PrecisionRequired = 2
+                 Structural = false, ShortName = "Ob1", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "Label:18O(2) (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "O'2 - O2", ID = 193, 
-                 Structural = false, ShortName = "Ob2", Hidden = false, PrecisionRequired = 3
+                 Structural = false, ShortName = "Ob2", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(3)15N(1) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'3N' - C3N", ID = 889, 
-                 Structural = false, ShortName = "M04", Hidden = false, PrecisionRequired = 2
+                 Structural = false, ShortName = "M04", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(3)15N(1) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'3N' - C3N", ID = 889, 
-                 Structural = false, ShortName = "M04", Hidden = false, PrecisionRequired = 1
+                 Structural = false, ShortName = "M04", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(3)15N(1) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C'3N' - C3N", ID = 889, 
-                 Structural = false, ShortName = "M04", Hidden = false, PrecisionRequired = 3
+                 Structural = false, ShortName = "M04", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(6)15N(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'6N'2 - C6N2", ID = 1302, 
-                 Structural = false, ShortName = "M08", Hidden = false, PrecisionRequired = 1
+                 Structural = false, ShortName = "M08", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(6)15N(2) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'6N'2 - C6N2", ID = 1302, 
-                 Structural = false, ShortName = "M08", Hidden = false, PrecisionRequired = 1
+                 Structural = false, ShortName = "M08", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(6)15N(2) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C'6N'2 - C6N2", ID = 1302, 
-                 Structural = false, ShortName = "M08", Hidden = false, PrecisionRequired = 1
+                 Structural = false, ShortName = "M08", Hidden = false, 
             },
             new UniModModificationData
             {
                  Name = "2-dimethylsuccinyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H8C6O4", ID = 1262, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "2-monomethylsuccinyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C5O4", ID = 1253, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "2-nitrobenzyl (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H5C7NO2", ID = 1032, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "2-succinyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H4C4O4", ID = 957, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "2HPG (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H10C16O5", ID = 187, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "3-deoxyglucosone (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H8C6O4", ID = 949, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "3sulfo (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H4C7O4S", ID = 748, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "4-ONE (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H14C9O2", ID = 721, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "4-ONE (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H14C9O2", ID = 721, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "4-ONE (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H14C9O2", ID = 721, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "4-ONE+Delta:H(-2)O(-1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H12C9O", ID = 743, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "4-ONE+Delta:H(-2)O(-1) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H12C9O", ID = 743, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "4-ONE+Delta:H(-2)O(-1) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C9O", ID = 743, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "4AcAllylGal (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H24C17O9", ID = 901, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "a-type-ion (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H2CO2", ID = 140, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AccQTag (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C10N2O", ID = 194, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AccQTag (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H6C10N2O", ID = 194, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Ac", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "1Ac", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Ac", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Ac", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "1Ac", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C2H2O", ID = 1, 
-                 Structural = true, ShortName = "1Ac", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Ac", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyldeoxyhypusine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H11C6N", ID = 1042, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetylhypusine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H11C6NO", ID = 1043, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ADP-Ribosyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H21C15N5O13P2", ID = 213, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ADP-Ribosyl (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H21C15N5O13P2", ID = 213, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ADP-Ribosyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H21C15N5O13P2", ID = 213, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ADP-Ribosyl (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H21C15N5O13P2", ID = 213, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ADP-Ribosyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H21C15N5O13P2", ID = 213, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ADP-Ribosyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H21C15N5O13P2", ID = 213, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEBS (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H9C8NO2S", ID = 276, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEBS (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C8NO2S", ID = 276, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEBS (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H9C8NO2S", ID = 276, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEBS (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H9C8NO2S", ID = 276, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEC-MAEC (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C2H5NS - O", ID = 472, 
-                 Structural = true, ShortName = "Aec", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Aec", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEC-MAEC (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C2H5NS - O", ID = 472, 
-                 Structural = true, ShortName = "Aec", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Aec", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AHA-Alkyne (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H5C4N5O - S", ID = 1000, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AHA-Alkyne-KDDDD (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H37C26N11O14 - S", ID = 1001, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AHA-SS (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H9C7N5O2", ID = 1249, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AHA-SS_CAM (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H12C9N6O3", ID = 1250, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ahx2+Hsl (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "H27C16N3O3", ID = 1015, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Amidine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H3C2N", ID = 141, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Amidine (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H3C2N", ID = 141, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Amidino (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H2CN2", ID = 440, 
-                 Structural = true, ShortName = "Amd", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Amd", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Amino (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "HN", ID = 342, 
-                 Structural = true, ShortName = "Amn", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Amn", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ammonia-loss (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "-H3N", ID = 385, 
-                 Structural = true, ShortName = "dAm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dAm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ammonia-loss (Protein N-term S)", 
                  AAs = "S", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H3N", ID = 385, 
-                 Structural = true, ShortName = "dAm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dAm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ammonia-loss (Protein N-term T)", 
                  AAs = "T", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H3N", ID = 385, 
-                 Structural = true, ShortName = "dAm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dAm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ammonium (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "H3N", ID = 989, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ammonium (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "H3N", ID = 989, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AMTzHexNAc2 (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H30C19N6O10", ID = 934, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AMTzHexNAc2 (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H30C19N6O10", ID = 934, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AMTzHexNAc2 (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H30C19N6O10", ID = 934, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Archaeol (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H86C43O2", ID = 410, 
-                 Structural = true, ShortName = "Ach", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Ach", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Arg (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H12C6N4O", ID = 1288, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Arg->GluSA (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "O - H5CN3", ID = 344, 
-                 Structural = true, ShortName = "AGA", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AGA", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Arg->Npo (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "C3NO2 - H", ID = 837, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Arg->Orn (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "-H2CN2", ID = 372, 
-                 Structural = true, ShortName = "Orn", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Orn", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Arg-loss (C-term R)", 
                  AAs = "R", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H12C6N4O", ID = 1287, 
-                 Structural = true, ShortName = "-1R", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "-1R", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Arg2PG (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H10C16O4", ID = 848, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Argbiotinhydrazide (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H13C9NO2S", ID = 343, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AROD (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H52C35N10O9S2", ID = 938, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Atto495Maleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H32C27N5O3", ID = 935, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "azole (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "-H4O", ID = 1355, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "azole (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "-H4O", ID = 1355, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Bacillosamine (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H16C10N2O4", ID = 910, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BADGE (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H24C21O4", ID = 493, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BDMAPP (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H12C11NOBr", ID = 684, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BDMAPP (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C11NOBr", ID = 684, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BDMAPP (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H12C11NOBr", ID = 684, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BDMAPP (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H12C11NOBr", ID = 684, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Benzoyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C7O", ID = 136, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Benzoyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H4C7O", ID = 136, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "benzylguanidine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C8N2", ID = 1349, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BHAc (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H25C16N3O3S", ID = 998, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BHT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H22C15O", ID = 176, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BHT (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H22C15O", ID = 176, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BHT (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H22C15O", ID = 176, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BHTOH (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H22C15O2", ID = 498, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BHTOH (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H22C15O2", ID = 498, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BHTOH (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H22C15O2", ID = 498, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin-HPDP (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H32C19N4O3S2", ID = 290, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin-PEG-PRA (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H42C26N8O7", ID = 895, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin-PEO-Amine (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H28C16N4O3S", ID = 289, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin-PEO-Amine (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H28C16N4O3S", ID = 289, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin-phenacyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H38C29N8O6S", ID = 774, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin-phenacyl (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H38C29N8O6S", ID = 774, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin-phenacyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H38C29N8O6S", ID = 774, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Cayman-10013 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C36H60N4O5S", ID = 539, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Cayman-10141 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C35H54N4O4S", ID = 538, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Invitrogen-M1602 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C23H33N5O7S", ID = 1012, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Sigma-B1267 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C20H27N5O5S", ID = 993, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-21325 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C34H45N7O7S", ID = 884, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-21345 (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "C15H25N3O2S", ID = 800, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-21360 (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "C21H37N5O6S", ID = 811, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-21901+2H2O (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C23H39N5O9S", ID = 1320, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-21901+H2O (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C23H37N5O8S", ID = 1039, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-21911 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C41H71N5O16S", ID = 1340, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-33033 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C25H35N6O4S2", ID = 1251, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-33033-H (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C25H34N6O4S2", ID = 1252, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-88310 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C10H16N2O2", ID = 1031, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-88317 (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C22H42N3O4P", ID = 1037, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Biotin:Thermo-88317 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C22H42N3O4P", ID = 1037, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "biotinAcrolein298 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H22C13N4O2S", ID = 1314, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "biotinAcrolein298 (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H22C13N4O2S", ID = 1314, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "biotinAcrolein298 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H22C13N4O2S", ID = 1314, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BisANS (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H22C32N2O6S2", ID = 519, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "bisANS-sulfonates (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H25C32N2", ID = 1330, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "bisANS-sulfonates (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H25C32N2", ID = 1330, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "bisANS-sulfonates (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H25C32N2", ID = 1330, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BITC (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C8NS", ID = 978, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BITC (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H7C8NS", ID = 978, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BITC (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H7C8NS", ID = 978, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BMOE (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H8C10N2O4", ID = 824, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BMP-piperidinol (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H17C18NO", ID = 1281, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "BMP-piperidinol (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H17C18NO", ID = 1281, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Bodipy (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H21C20N4O3F2B", ID = 878, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Bromo (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.None, Formula = "Br - H", ID = 340, 
-                 Structural = true, ShortName = "1Br", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Br", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Bromo (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "Br - H", ID = 340, 
-                 Structural = true, ShortName = "1Br", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Br", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Bromo (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "Br - H", ID = 340, 
-                 Structural = true, ShortName = "1Br", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Br", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Bromo (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "Br - H", ID = 340, 
-                 Structural = true, ShortName = "1Br", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Br", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Bromobimane (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H10C10N2O2", ID = 301, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Butyryl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C4O", ID = 1289, 
-                 Structural = true, ShortName = "Byr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Byr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "C8-QAT (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H29C14NO", ID = 513, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "C8-QAT (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H29C14NO", ID = 513, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CAF (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H4C3O4S", ID = 272, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CAMthiopropanoyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H7C5NO2S", ID = 293, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Can-FP-biotin (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H34C19N3O5PS", ID = 333, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Can-FP-biotin (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H34C19N3O5PS", ID = 333, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Can-FP-biotin (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H34C19N3O5PS", ID = 333, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamidomethyl (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 4, 
-                 Structural = true, ShortName = "CAM", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "CAM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CarbamidomethylDTT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H11C6NO3S2", ID = 893, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CRM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CRM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CRM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CRM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CRM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbamyl (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "HCNO", ID = 5, 
-                 Structural = true, ShortName = "CRM", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "CRM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carbofuran (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H4C2NO", ID = 977, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxy (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "CO2", ID = 299, 
-                 Structural = true, ShortName = "Cox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Cox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxy (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "CO2", ID = 299, 
-                 Structural = true, ShortName = "Cox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Cox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxy (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "CO2", ID = 299, 
-                 Structural = true, ShortName = "Cox", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Cox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxy (Protein N-term M)", 
                  AAs = "M", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "CO2", ID = 299, 
-                 Structural = true, ShortName = "Cox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Cox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxy (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "CO2", ID = 299, 
-                 Structural = true, ShortName = "Cox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Cox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxy->Thiocarboxy (Protein C-term G)", 
                  AAs = "G", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "S - O", ID = 420, 
-                 Structural = true, ShortName = "Scx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Scx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxyethyl (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H4C3O2", ID = 378, 
-                 Structural = true, ShortName = "CEt", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CEt", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxyethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C3O2", ID = 378, 
-                 Structural = true, ShortName = "CEt", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CEt", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxymethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C2H2O2", ID = 6, 
-                 Structural = true, ShortName = "Cmc", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Cmc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxymethyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C2H2O2", ID = 6, 
-                 Structural = true, ShortName = "Cmc", Hidden = true, PrecisionRequired = 3
+                 Structural = true, ShortName = "Cmc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxymethyl (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "C2H2O2", ID = 6, 
-                 Structural = true, ShortName = "Cmc", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Cmc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CarboxymethylDMAP (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H10C9N2O", ID = 1350, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CarboxymethylDTT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H10C6O4S2", ID = 894, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Ag (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Ag - H", ID = 955, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Ag (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Ag - H", ID = 955, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Ca[II] (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Ca - H2", ID = 951, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Ca[II] (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Ca - H2", ID = 951, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Cu[I] (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Cu - H", ID = 531, 
-                 Structural = true, ShortName = "CuX", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "CuX", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Cu[I] (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Cu - H", ID = 531, 
-                 Structural = true, ShortName = "CuX", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CuX", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Fe[II] (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Fe - H2", ID = 952, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Fe[II] (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Fe - H2", ID = 952, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:K (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "K - H", ID = 530, 
-                 Structural = true, ShortName = "KXX", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "KXX", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:K (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "K - H", ID = 530, 
-                 Structural = true, ShortName = "KXX", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "KXX", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Li (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Li - H", ID = 950, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Li (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Li - H", ID = 950, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Mg[II] (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Mg - H2", ID = 956, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Mg[II] (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Mg - H2", ID = 956, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Ni[II] (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Ni - H2", ID = 953, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Ni[II] (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Ni - H2", ID = 953, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Zn[II] (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "Zn - H2", ID = 954, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cation:Zn[II] (DE)", 
                  AAs = "D, E", LabelAtoms = LabelAtoms.None, Formula = "Zn - H2", ID = 954, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "cGMP (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H11C10N5O7P", ID = 849, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "cGMP (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H11C10N5O7P", ID = 849, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "cGMP+RMP-loss (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H4C5N5O", ID = 851, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "cGMP+RMP-loss (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H4C5N5O", ID = 851, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CHDH (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H26C17O4", ID = 434, 
-                 Structural = true, ShortName = "CHD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CHD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Chlorination (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "Cl", ID = 936, 
-                 Structural = true, ShortName = "1Cl", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Cl", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Chlorpyrifos (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H10C4O2PS", ID = 975, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Chlorpyrifos (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H10C4O2PS", ID = 975, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Chlorpyrifos (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H10C4O2PS", ID = 975, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_2 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C6C'N2O", ID = 525, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_2 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H12C6C'N2O", ID = 525, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_2 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H12C6C'N2O", ID = 525, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_3 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N3O4", ID = 536, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_3 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N3O4", ID = 536, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_3 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N3O4", ID = 536, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_4 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H15C9C'N2O5", ID = 537, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_4 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H15C9C'N2O5", ID = 537, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CLIP_TRAQ_4 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H15C9C'N2O5", ID = 537, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CoenzymeA (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H34C21N7O16P3S", ID = 281, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cresylphosphate (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H7C7O3P", ID = 1255, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cresylphosphate (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H7C7O3P", ID = 1255, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cresylphosphate (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H7C7O3P", ID = 1255, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cresylphosphate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H7C7O3P", ID = 1255, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cresylphosphate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H7C7O3P", ID = 1255, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cresylphosphate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H7C7O3P", ID = 1255, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CresylSaligeninPhosphate (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H13C14O4P", ID = 1256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CresylSaligeninPhosphate (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H13C14O4P", ID = 1256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CresylSaligeninPhosphate (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H13C14O4P", ID = 1256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CresylSaligeninPhosphate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H13C14O4P", ID = 1256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CresylSaligeninPhosphate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H13C14O4P", ID = 1256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CresylSaligeninPhosphate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H13C14O4P", ID = 1256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Crotonaldehyde (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C4O", ID = 253, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Crotonaldehyde (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H6C4O", ID = 253, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Crotonaldehyde (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C4O", ID = 253, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CuSMo (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H24C19N8O15P2S3MoCu", ID = 444, 
-                 Structural = true, ShortName = "CSM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CSM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cy3-maleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H45C37N4O9S2", ID = 1348, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cy3b-maleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H38C37N4O7S", ID = 821, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cyano (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "CN - H", ID = 438, 
-                 Structural = true, ShortName = "1CN", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1CN", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CyDye-Cy3 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H44C37N4O6S", ID = 494, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "CyDye-Cy5 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H44C38N4O6S", ID = 495, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cys->Dha (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "-H2S", ID = 368, 
-                 Structural = true, ShortName = "DHA", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "DHA", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cys->ethylaminoAla (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H5C2N - S", ID = 940, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cys->methylaminoAla (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H3CN - S", ID = 939, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cys->Oxoalanine (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "O - H2S", ID = 402, 
-                 Structural = true, ShortName = "COa", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "COa", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cys->PyruvicAcid (Protein N-term C)", 
                  AAs = "C", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "O - H3NS", ID = 382, 
-                 Structural = true, ShortName = "CPA", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "CPA", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cysteinyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H5C3NO2S", ID = 312, 
-                 Structural = true, ShortName = "SCC", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "SCC", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "cysTMT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H25C14N3O2S", ID = 984, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H22C19O7", ID = 270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H22C19O7", ID = 270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H22C19O7", ID = 270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "H22C19O7", ID = 270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H22C19O7", ID = 270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H22C19O7", ID = 270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H22C19O7", ID = 270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne+water (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H24C19O8", ID = 271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne+water (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H24C19O8", ID = 271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne+water (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H24C19O8", ID = 271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne+water (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H24C19O8", ID = 271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne+water (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H24C19O8", ID = 271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne+water (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H24C19O8", ID = 271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Cytopiloyne+water (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H24C19O8", ID = 271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DAET (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H9C4NS - O", ID = 178, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DAET (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H9C4NS - O", ID = 178, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dansyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H11C12NO2S", ID = 139, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dansyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H11C12NO2S", ID = 139, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Deamidated (Protein N-term F)", 
                  AAs = "F", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "O - HN", ID = 7, 
-                 Structural = true, ShortName = "Dea", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dea", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Deamidated (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "O - HN", ID = 7, 
-                 Structural = true, ShortName = "Dea", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dea", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Deamidated:18O(1) (NQ)", 
                  AAs = "N, Q", LabelAtoms = LabelAtoms.None, Formula = "O' - HN", ID = 366, 
-                 Structural = true, ShortName = "DeO", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "DeO", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Decanoyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H18C10O", ID = 449, 
-                 Structural = true, ShortName = "Dec", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dec", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Decanoyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H18C10O", ID = 449, 
-                 Structural = true, ShortName = "Dec", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dec", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DEDGFLYMVYASQETFG (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H122C89N18O31S", Losses = new [] { new FragmentLoss("H2O"), }, ID = 1010, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dehydrated (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 23, 
-                 Structural = true, ShortName = "Dhy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dhy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dehydrated (Protein C-term N)", 
                  AAs = "N", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 23, 
-                 Structural = true, ShortName = "Dhy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dhy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dehydrated (Protein C-term Q)", 
                  AAs = "Q", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 23, 
-                 Structural = true, ShortName = "Dhy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dhy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dehydrated (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 23, 
-                 Structural = true, ShortName = "Dhy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dhy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dehydrated (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 23, 
-                 Structural = true, ShortName = "Dhy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dhy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dehydrated (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "-H2O", ID = 23, 
-                 Structural = true, ShortName = "Dhy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dhy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(1)O(-1)18O(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "O' - HN", ID = 170, 
-                 Structural = true, ShortName = "DeW", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "DeW", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(2)C(2) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H2C2", ID = 254, 
-                 Structural = true, ShortName = "AAS", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AAS", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(2)C(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C2", ID = 254, 
-                 Structural = true, ShortName = "AAS", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AAS", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(2)C(2) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H2C2", ID = 254, 
-                 Structural = true, ShortName = "AAS", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AAS", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(2)C(3) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C3", ID = 207, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(2)C(3)O(1) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C3O", ID = 319, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(2)C(3)O(1) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H2C3O", ID = 319, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(2)C(5) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C5", ID = 318, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(2) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 255, 
-                 Structural = true, ShortName = "AAR", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AAR", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 255, 
-                 Structural = true, ShortName = "AAR", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AAR", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(2) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 255, 
-                 Structural = true, ShortName = "AAR", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AAR", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(2)O(-1)S(1) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H4C2S - O", ID = 327, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(3) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H4C3", ID = 256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(3) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C3", ID = 256, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(3)O(1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H4C3O", ID = 206, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(3)O(1) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H4C3O", ID = 206, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(3)O(1) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C3O", ID = 206, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(4)C(6) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C6", ID = 208, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(5)C(2) (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "H5C2", ID = 529, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(6)C(3)O(1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C3O", ID = 1312, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(6)C(3)O(1) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H6C3O", ID = 1312, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(6)C(3)O(1) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C3O", ID = 1312, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(6)C(6)O(1) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C6O", ID = 205, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(8)C(6)O(1) (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.None, Formula = "H8C6O", ID = 1313, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:H(8)C(6)O(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C6O2", ID = 209, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:Hg(1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "Hg", ID = 291, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:S(-1)Se(1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "Se - S", ID = 162, 
-                 Structural = true, ShortName = "SSe", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "SSe", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:S(-1)Se(1) (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "Se - S", ID = 162, 
-                 Structural = true, ShortName = "SSe", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "SSe", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Delta:Se(1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "Se", ID = 423, 
-                 Structural = true, ShortName = "1Se", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Se", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Deoxy (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "-O", ID = 447, 
-                 Structural = true, ShortName = "dOx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dOx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Deoxy (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "-O", ID = 447, 
-                 Structural = true, ShortName = "dOx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dOx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Deoxy (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "-O", ID = 447, 
-                 Structural = true, ShortName = "dOx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dOx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Deoxyhypusine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C4N", ID = 1041, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DeStreak (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H4C2OS", ID = 303, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dethiomethyl (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "-H4CS", ID = 526, 
-                 Structural = true, ShortName = "DTM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "DTM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DFDNB (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4F2", ID = 825, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DFDNB (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4F2", ID = 825, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DFDNB (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4F2", ID = 825, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DFDNB (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4F2", ID = 825, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dHex (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H10C6O4", ID = 295, 
-                 Structural = true, ShortName = "dHx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dHx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dHex (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H10C6O4", ID = 295, 
-                 Structural = true, ShortName = "dHx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dHx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dHex (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H10C6O4", ID = 295, 
-                 Structural = true, ShortName = "dHx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dHx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dHex(1)Hex(3)HexNAc(4) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H92C56N4O39", ID = 305, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dHex(1)Hex(4)HexNAc(4) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H102C62N4O44", ID = 307, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dHex(1)Hex(5)HexNAc(4) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H112C68N4O49", ID = 308, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DHP (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H8C8N", ID = 488, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diacylglycerol (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H68C37O4", ID = 377, 
-                 Structural = true, ShortName = "DiG", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "DiG", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dibromo (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "Br2 - H2", ID = 534, 
-                 Structural = true, ShortName = "2Br", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Br", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dicarbamidomethyl (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H6C4N2O2", ID = 1290, 
-                 Structural = true, ShortName = "2CM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2CM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dichlorination (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "Cl2", ID = 937, 
-                 Structural = true, ShortName = "2Cl", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Cl", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dichlorination (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "Cl2", ID = 937, 
-                 Structural = true, ShortName = "2Cl", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Cl", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Didehydro (C-term K)", 
                  AAs = "K", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H2", ID = 401, 
-                 Structural = true, ShortName = "-2H", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "-2H", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Didehydro (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "-H2", ID = 401, 
-                 Structural = true, ShortName = "-2H", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "-2H", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Didehydro (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "-H2", ID = 401, 
-                 Structural = true, ShortName = "-2H", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "-2H", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Didehydro (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "-H2", ID = 401, 
-                 Structural = true, ShortName = "-2H", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "-2H", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Didehydroretinylidene (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H24C20", ID = 433, 
-                 Structural = true, ShortName = "ddR", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "ddR", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C4", ID = 518, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H8C4", ID = 518, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethylphosphate (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H9C4O3P", ID = 725, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethylphosphate (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H9C4O3P", ID = 725, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethylphosphate (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C4O3P", ID = 725, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethylphosphate (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H9C4O3P", ID = 725, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethylphosphate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H9C4O3P", ID = 725, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethylphosphate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H9C4O3P", ID = 725, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diethylphosphate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H9C4O3P", ID = 725, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Difuran (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H4C8O2", ID = 1279, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dihydroxyimidazolidine (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H4C3O2", ID = 830, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diiodo (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "I2 - H2", ID = 130, 
-                 Structural = true, ShortName = "2Io", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Io", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diiodo (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "I2 - H2", ID = 130, 
-                 Structural = true, ShortName = "2Io", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Io", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diironsubcluster (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C5N2O5S2Fe2 - H", ID = 439, 
-                 Structural = true, ShortName = "dFe", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dFe", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diisopropylphosphate (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H13C6O3P", ID = 362, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diisopropylphosphate (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H13C6O3P", ID = 362, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diisopropylphosphate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H13C6O3P", ID = 362, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diisopropylphosphate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H13C6O3P", ID = 362, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diisopropylphosphate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H13C6O3P", ID = 362, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex115 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H15C7C'N'O'", ID = 1321, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex115 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H15C7C'N'O'", ID = 1321, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex115 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H15C7C'N'O'", ID = 1321, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex117 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H13H'2C7C'N'O", ID = 1323, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex117 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H13H'2C7C'N'O", ID = 1323, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex117 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H13H'2C7C'N'O", ID = 1323, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex118 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H11H'4C8NO", ID = 1324, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex118 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H11H'4C8NO", ID = 1324, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DiLeu4plex118 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H11H'4C8NO", ID = 1324, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C2H4", ID = 36, 
-                 Structural = true, ShortName = "2Me", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "2Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "C2H4", ID = 36, 
-                 Structural = true, ShortName = "2Me", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "2Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C2H4", ID = 36, 
-                 Structural = true, ShortName = "2Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl (Protein N-term P)", 
                  AAs = "P", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C2H4", ID = 36, 
-                 Structural = true, ShortName = "2Me", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "2Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "C2H4", ID = 36, 
-                 Structural = true, ShortName = "2Me", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "2Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(4) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'4C2", ID = 199, 
-                 Structural = true, ShortName = "DM4", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "DM4", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(4) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'4C2", ID = 199, 
-                 Structural = true, ShortName = "DM4", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "DM4", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(4)13C(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'2H'4", ID = 510, 
-                 Structural = true, ShortName = "D6a", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "D6a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(4)13C(2) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'2H'4", ID = 510, 
-                 Structural = true, ShortName = "D6a", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "D6a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DimethylamineGMBS (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H21C13N3O3", ID = 943, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DimethylArsino (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H5C2As", ID = 902, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DimethylpyrroleAdduct (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C6", ID = 316, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "2Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dioxidation (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "O2", ID = 425, 
-                 Structural = true, ShortName = "2Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Diphthamide (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H15C7N2O", ID = 375, 
-                 Structural = true, ShortName = "Dip", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Dip", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dipyridyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H11C13N3O", ID = 1277, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dipyrrolylmethanemethyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H22C20N2O8", ID = 416, 
-                 Structural = true, ShortName = "dpM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "dpM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DMPO (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO", ID = 1017, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DMPO (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO", ID = 1017, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DMPO (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO", ID = 1017, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DNCB_hapten (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4", ID = 1331, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DNCB_hapten (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4", ID = 1331, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DNCB_hapten (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4", ID = 1331, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DNCB_hapten (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H2C6N2O4", ID = 1331, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "dNIC (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "HH'3C6NO", ID = 698, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DNPS (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H3C6N2O4S", ID = 941, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DNPS (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H3C6N2O4S", ID = 941, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTBP (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5C3NS", ID = 324, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTBP (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H5C3NS", ID = 324, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTBP (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "H5C3NS", ID = 324, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTBP (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H5C3NS", ID = 324, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTT_C (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C4H8O2S", ID = 736, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTT_ST (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C4H8OS2", ID = 735, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTT_ST (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C4H8OS2", ID = 735, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DyLight-maleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H48C39N4O15S4", ID = 890, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EDT-iodoacetyl-PEO-biotin (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H34C20N4O4S3", ID = 118, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EDT-iodoacetyl-PEO-biotin (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H34C20N4O4S3", ID = 118, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EDT-maleimide-PEO-biotin (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H39C25N5O6S3", ID = 93, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EDT-maleimide-PEO-biotin (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H39C25N5O6S3", ID = 93, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EGCG1 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H16C22O11", ID = 1002, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EGCG2 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H11C15O6", ID = 1003, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EHD-diphenylpentanone (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H18C18O2", ID = 1317, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EHD-diphenylpentanone (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H18C18O2", ID = 1317, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EQAT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C10H20N2O", ID = 197, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EQIGG (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H32C20N6O8", ID = 846, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ESP (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C16H26N4O2S", ID = 90, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ESP (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C16H26N4O2S", ID = 90, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethanedithiol (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H4C2S2 - O", ID = 200, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethanedithiol (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H4C2S2 - O", ID = 200, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethanolamine (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "H5C2N", ID = 734, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethanolamine (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H5C2N", ID = 734, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethanolamine (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H5C2N", ID = 734, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethanolyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C2O", ID = 278, 
-                 Structural = true, ShortName = "EtO", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "EtO", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethanolyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H4C2O", ID = 278, 
-                 Structural = true, ShortName = "EtO", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "EtO", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethoxyformyl (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H5C3O2", ID = 915, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethyl (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 280, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethyl (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 280, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethyl (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 280, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 280, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H4C2", ID = 280, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethyl+Deamidated (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H3C2O - N", ID = 931, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethyl+Deamidated (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "H3C2O - N", ID = 931, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ethylamino (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H5C2N - O", ID = 926, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ethylamino (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H5C2N - O", ID = 926, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethylphosphate (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 726, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethylphosphate (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 726, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethylphosphate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 726, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethylphosphate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 726, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ethylphosphate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 726, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FAD (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H31C27N9O15P2", ID = 50, 
-                 Structural = true, ShortName = "FAD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "FAD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FAD (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H31C27N9O15P2", ID = 50, 
-                 Structural = true, ShortName = "FAD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "FAD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FAD (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H31C27N9O15P2", ID = 50, 
-                 Structural = true, ShortName = "FAD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "FAD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Farnesyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H24C15", ID = 44, 
-                 Structural = true, ShortName = "Far", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Far", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Fluorescein (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H14C22NO6", ID = 128, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Fluoro (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.None, Formula = "F - H", ID = 127, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Fluoro (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "F - H", ID = 127, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Fluoro (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "F - H", ID = 127, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FMN (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H19C17N4O8P", ID = 442, 
-                 Structural = true, ShortName = "FMN", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "FMN", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FMN (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H19C17N4O8P", ID = 442, 
-                 Structural = true, ShortName = "FMN", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "FMN", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FMNC (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H21C17N4O9P", ID = 443, 
-                 Structural = true, ShortName = "FNC", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "FNC", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FMNH (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H19C17N4O9P", ID = 409, 
-                 Structural = true, ShortName = "FNH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "FNH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FMNH (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H19C17N4O9P", ID = 409, 
-                 Structural = true, ShortName = "FNH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "FNH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FNEM (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H13C24NO7", ID = 515, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Formyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "CO", ID = 122, 
-                 Structural = true, ShortName = "Frm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Frm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Formyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "CO", ID = 122, 
-                 Structural = true, ShortName = "Frm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Frm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Formyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "CO", ID = 122, 
-                 Structural = true, ShortName = "Frm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Frm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FP-Biotin (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H49C27N4O5PS", ID = 325, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FP-Biotin (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H49C27N4O5PS", ID = 325, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FP-Biotin (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H49C27N4O5PS", ID = 325, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FP-Biotin (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H49C27N4O5PS", ID = 325, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FTC (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H15C21N3O5S", ID = 478, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FTC (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H15C21N3O5S", ID = 478, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FTC (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "H15C21N3O5S", ID = 478, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FTC (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H15C21N3O5S", ID = 478, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "FTC (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H15C21N3O5S", ID = 478, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Furan (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H2C4O", ID = 1278, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "G-H1 (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "C2O", ID = 860, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Galactosyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H10C6O6", Losses = new [] { new FragmentLoss("H10C6O5"), }, ID = 907, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GeranylGeranyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H32C20", ID = 48, 
-                 Structural = true, ShortName = "2Ge", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "2Ge", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GGQ (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H14C9N4O4", ID = 1292, 
-                 Structural = true, ShortName = "GGQ", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "GGQ", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C7H13NO", Losses = new [] { new FragmentLoss("H9C3N"), }, ID = 60, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C7H13NO", Losses = new [] { new FragmentLoss("H9C3N"), }, ID = 60, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Glu (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H7C5NO3", ID = 450, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Gluconoylation (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H10C6O6", ID = 1343, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Gluconoylation (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H10C6O6", ID = 1343, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "glucosone (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H8C6O5", ID = 981, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Glucosylgalactosyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H20C12O11", Losses = new [] { new FragmentLoss("H10C6O5"), new FragmentLoss("H20C12O10"), }, ID = 393, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Glucuronyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H8C6O6", ID = 54, 
-                 Structural = true, ShortName = "GCn", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "GCn", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GluGlu (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H14C10N2O6", ID = 451, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GluGluGlu (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H21C15N3O9", ID = 452, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GluGluGluGlu (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H28C20N4O12", ID = 453, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Glutathione (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H15C10N3O6S", ID = 55, 
-                 Structural = true, ShortName = "GSO", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "GSO", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Gly (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 1263, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Gly (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 1263, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Gly (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H3C2NO", ID = 1263, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Gly-loss+Amide (C-term G)", 
                  AAs = "G", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H2C2O2", ID = 822, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Glycerophospho (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H7C3O5P", ID = 419, 
-                 Structural = true, ShortName = "GPh", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "GPh", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GlycerylPE (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H12C5NO5P", ID = 396, 
-                 Structural = true, ShortName = "GPE", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "GPE", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "glycidamide (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5C3NO2", ID = 1014, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "glycidamide (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H5C3NO2", ID = 1014, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Glycosyl (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "H8C5O5", ID = 408, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GlyGly (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C4N2O2", ID = 121, 
-                 Structural = true, ShortName = "UGG", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "UGG", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GlyGly (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C4N2O2", ID = 121, 
-                 Structural = true, ShortName = "UGG", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "UGG", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GlyGly (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H6C4N2O2", ID = 121, 
-                 Structural = true, ShortName = "UGG", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "UGG", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GlyGly (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H6C4N2O2", ID = 121, 
-                 Structural = true, ShortName = "UGG", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "UGG", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Guanidinyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H2CN2", ID = 52, 
-                 Structural = true, ShortName = "1Gu", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "1Gu", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HCysteinyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C4NO2S", ID = 1271, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HCysThiolactone (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H7C4NOS", ID = 1270, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Heme (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H32C34N4O4Fe", ID = 390, 
-                 Structural = true, ShortName = "HEM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "HEM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Heme (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H32C34N4O4Fe", ID = 390, 
-                 Structural = true, ShortName = "HEM", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "HEM", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hep (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C7O6", ID = 490, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hep (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H12C7O6", ID = 490, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hep (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "H12C7O6", ID = 490, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hep (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H12C7O6", ID = 490, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hep (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H12C7O6", ID = 490, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hep (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H12C7O6", ID = 490, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H10C6O5", ID = 41, 
-                 Structural = true, ShortName = "Hex", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Hex", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(1)dHex(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H33C20NO14", ID = 146, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(1)NeuAc(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H40C25N2O18", ID = 149, 
-                 Structural = true, ShortName = "NHH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NHH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(1)NeuAc(1) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H40C25N2O18", ID = 149, 
-                 Structural = true, ShortName = "NHH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NHH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(1)NeuAc(1) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H40C25N2O18", ID = 149, 
-                 Structural = true, ShortName = "NHH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NHH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(1)NeuAc(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H57C36N3O26", ID = 160, 
-                 Structural = true, ShortName = "NHN", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NHN", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(1)NeuAc(2) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H57C36N3O26", ID = 160, 
-                 Structural = true, ShortName = "NHN", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NHN", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(1)NeuAc(2) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H57C36N3O26", ID = 160, 
-                 Structural = true, ShortName = "NHN", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NHN", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H36C22N2O15", ID = 148, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(2)dHex(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H46C28N2O19", ID = 152, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(2)dHex(1)Pent(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H54C33N2O23", ID = 155, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(2)dHex(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H56C34N2O23", ID = 156, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(1)HexNAc(2)Pent(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H44C27N2O19", ID = 151, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H20C12O10", ID = 512, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(2) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H20C12O10", ID = 512, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(2)HexNAc(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H46C28N2O20", ID = 153, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(2)HexNAc(2)dHex(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H56C34N2O24", ID = 158, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(2)HexNAc(2)Pent(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H54C33N2O24", ID = 157, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(3) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H30C18O15", ID = 144, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(3)HexNAc(1)Pent(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H51C31NO24", ID = 154, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(3)HexNAc(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H56C34N2O25", ID = 159, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(3)HexNAc(2)P(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H56C34N2O25P", ID = 161, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(3)HexNAc(4) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H82C50N4O35", ID = 309, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(4)HexNAc(4) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H92C56N4O40", ID = 310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(5)HexNAc(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H76C46N2O35", ID = 137, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex(5)HexNAc(4) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H102C62N4O45", ID = 311, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex1HexNAc1 (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H23C14NO10", ID = 793, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex1HexNAc1 (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H23C14NO10", ID = 793, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hex1HexNAc1 (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H23C14NO10", ID = 793, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexN (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H11C6NO4", ID = 454, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexN (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H11C6NO4", ID = 454, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexN (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H11C6NO4", ID = 454, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexN (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H11C6NO4", ID = 454, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H13C8NO5", ID = 43, 
-                 Structural = true, ShortName = "HNc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "HNc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H13C8NO5", ID = 43, 
-                 Structural = true, ShortName = "HNc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "HNc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H13C8NO5", ID = 43, 
-                 Structural = true, ShortName = "HNc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "HNc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc(1)dHex(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H23C14NO9", ID = 142, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc(1)dHex(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H33C20NO13", ID = 145, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H26C16N2O10", ID = 143, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc(2)dHex(1) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H36C22N2O14", ID = 147, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HexNAc(2)dHex(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H46C28N2O18", ID = 150, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HMVK (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C4O2", ID = 371, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE (A)", 
                  AAs = "A", LabelAtoms = LabelAtoms.None, Formula = "H16C9O2", ID = 53, 
-                 Structural = true, ShortName = "HNE", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "HNE", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H16C9O2", ID = 53, 
-                 Structural = true, ShortName = "HNE", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "HNE", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H16C9O2", ID = 53, 
-                 Structural = true, ShortName = "HNE", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "HNE", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H16C9O2", ID = 53, 
-                 Structural = true, ShortName = "HNE", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "HNE", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.None, Formula = "H16C9O2", ID = 53, 
-                 Structural = true, ShortName = "HNE", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "HNE", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE+Delta:H(2) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H18C9O2", ID = 335, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE+Delta:H(2) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H18C9O2", ID = 335, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE+Delta:H(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H18C9O2", ID = 335, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE-BAHAH (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H45C25N5O4S", ID = 912, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE-BAHAH (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H45C25N5O4S", ID = 912, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE-BAHAH (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H45C25N5O4S", ID = 912, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE-Delta:H(2)O (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H14C9O", ID = 720, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE-Delta:H(2)O (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H14C9O", ID = 720, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HNE-Delta:H(2)O (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H14C9O", ID = 720, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HPG (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H4C8O2", ID = 186, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hydroxycinnamyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C9O2", ID = 407, 
-                 Structural = true, ShortName = "hCn", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "hCn", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hydroxyfarnesyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H24C15O", ID = 376, 
-                 Structural = true, ShortName = "HFr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "HFr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hydroxyheme (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H30C34N4O4Fe", ID = 436, 
-                 Structural = true, ShortName = "hHm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "hHm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hydroxymethyl (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H2CO", ID = 414, 
-                 Structural = true, ShortName = "h1M", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "h1M", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "HydroxymethylOP (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C6O2", ID = 886, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hydroxytrimethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H7C3O", ID = 445, 
-                 Structural = true, ShortName = "h3M", Hidden = true, PrecisionRequired = 3
+                 Structural = true, ShortName = "h3M", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Hypusine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C4NO", ID = 379, 
-                 Structural = true, ShortName = "Hps", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Hps", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IBTP (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H21C22P", ID = 119, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-D (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H34C20N4O5S", ID = 13, 
-                 Structural = true, ShortName = "d0I", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "d0I", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-D:2H(8) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H26H'8C20N4O5S", ID = 12, 
-                 Structural = true, ShortName = "d8I", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "d8I", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-G (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C22H38N4O6S", ID = 8, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-H (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C15ClH20NO6", ID = 123, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICDID (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C8H10O2", ID = 1018, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICPL (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C6H3NO", ID = 365, 
-                 Structural = true, ShortName = "IP0", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "IP0", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICPL:13C(6) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H3C'6NO", ID = 364, 
-                 Structural = true, ShortName = "IP6", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "IP6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IDEnT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C9NOCl2", ID = 762, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IED-Biotin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H22C14N4O3S", ID = 294, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IGBP (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "BrC12H13N2O2", ID = 243, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IMEHex(2)NeuAc (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H40C25N2O18S", ID = 1286, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IMID (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C3H4N2", ID = 94, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Iminobiotin (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H15C10N3OS", ID = 89, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Iminobiotin (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H15C10N3OS", ID = 89, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Iodo (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "I - H", ID = 129, 
-                 Structural = true, ShortName = "Iod", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Iod", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Iodo (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "I - H", ID = 129, 
-                 Structural = true, ShortName = "Iod", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Iod", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H28C16N4O3", ID = 1341, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H28C16N4O3", ID = 1341, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H28C16N4O3", ID = 1341, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H28C16N4O3", ID = 1341, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H28C16N4O3", ID = 1341, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT6plex (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H28C12C'4N3N'O3", ID = 1342, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT6plex (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H28C12C'4N3N'O3", ID = 1342, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT6plex (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H28C12C'4N3N'O3", ID = 1342, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT6plex (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H28C12C'4N3N'O3", ID = 1342, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iodoTMT6plex (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H28C12C'4N3N'O3", ID = 1342, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IodoU-AMP (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.None, Formula = "H11C9N2O9P", ID = 292, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IodoU-AMP (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H11C9N2O9P", ID = 292, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IodoU-AMP (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H11C9N2O9P", ID = 292, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ISD_z+2_ion (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-HN", ID = 991, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Isopropylphospho (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H7C3O3P", ID = 363, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Isopropylphospho (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H7C3O3P", ID = 363, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Isopropylphospho (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H7C3O3P", ID = 363, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H12C4C'3NN'O", ID = 214, 
-                 Structural = true, ShortName = "IT4", Hidden = true, PrecisionRequired = 3
+                 Structural = true, ShortName = "IT4", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H12C4C'3NN'O", ID = 214, 
-                 Structural = true, ShortName = "IT4", Hidden = true, PrecisionRequired = 3
+                 Structural = true, ShortName = "IT4", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H12C4C'3NN'O", ID = 214, 
-                 Structural = true, ShortName = "IT4", Hidden = true, PrecisionRequired = 3
+                 Structural = true, ShortName = "IT4", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex114 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C5C'2N2O'", ID = 532, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex114 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H12C5C'2N2O'", ID = 532, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex114 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H12C5C'2N2O'", ID = 532, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex115 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C6C'NN'O'", ID = 533, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex115 (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H12C6C'NN'O'", ID = 533, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ4plex115 (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H12C6C'NN'O'", ID = 533, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "C'7N'C7H24N3O3", ID = 730, 
-                 Structural = true, ShortName = "IT8", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "IT8", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C'7N'C7H24N3O3", ID = 730, 
-                 Structural = true, ShortName = "IT8", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "IT8", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C'7N'C7H24N3O3", ID = 730, 
-                 Structural = true, ShortName = "IT8", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "IT8", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex:13C(6)15N(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'6N'2C8H24N2O3", ID = 731, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex:13C(6)15N(2) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'6N'2C8H24N2O3", ID = 731, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "iTRAQ8plex:13C(6)15N(2) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C'6N'2C8H24N2O3", ID = 731, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(1)2H(3)+Oxidation (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H'3C'O - H3C", ID = 885, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(4)+Oxidation (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "C'4O - C4", ID = 1267, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(4)15N(2)+GlyGly (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C'4N'2O2", ID = 923, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)+Acetyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C'6O - C4", ID = 835, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)+Dimethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C'6 - C4", ID = 986, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)+GlyGly (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C'6N2O2 - C2", ID = 799, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(2)+Acetyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C'6N'2O - C4N2", ID = 836, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(2)+Dimethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C'6N'2 - C4N2", ID = 987, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(2)+GlyGly (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C'6N'2O2 - C2", ID = 864, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(4)+Dimethyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H4C'6N'4 - C4N4", ID = 1005, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(4)+Dimethyl:2H(6)13C(2) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H'6C'8N'4 - H2C6N4", ID = 1007, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(4)+Methyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H2C'6N'4 - C5N4", ID = 1004, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(4)+Methyl:2H(3)13C(1) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H'3C'7N'4 - HC6N4", ID = 1006, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(9)+Phospho (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "HC'9O3P - C9", ID = 185, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(4)+Acetyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'4C2O - H2", ID = 834, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(4)+GlyGly (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2H'4C4N2O2", ID = 853, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "lapachenole (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H16C16O2", ID = 771, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Leu->MetOx (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.None, Formula = "OS - H2C", ID = 905, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LeuArgGlyGly (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H29C16N7O4", ID = 535, 
-                 Structural = true, ShortName = "Umc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Umc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-anhydrolactam (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H26C20O3", ID = 946, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-anhydrolactam (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H26C20O3", ID = 946, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-anhyropyrrole (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H26C20O2", ID = 948, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-anhyropyrrole (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H26C20O2", ID = 948, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-Hlactam-K (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H28C20O5", ID = 504, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-Hlactam-R (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H26C19O5 - N2", ID = 506, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-lactam-K (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H28C20O4", ID = 503, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-lactam-R (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H26C19O4 - N2", ID = 505, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-pyrrole (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H28C20O3", ID = 947, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "LG-pyrrole (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H28C20O3", ID = 947, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lipoyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C8OS2", ID = 42, 
-                 Structural = true, ShortName = "Lip", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Lip", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lys (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H12C6N2O", ID = 1301, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lys->Allysine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "O - H3N", ID = 352, 
-                 Structural = true, ShortName = "LAA", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "LAA", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lys->AminoadipicAcid (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "O2 - H3N", ID = 381, 
-                 Structural = true, ShortName = "AAA", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AAA", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lys->CamCys (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "OS - H4C", ID = 903, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lys->MetOx (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "OS - H3CN", ID = 906, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lys-loss (Protein C-term K)", 
                  AAs = "K", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "-H12C6N2O", ID = 313, 
-                 Structural = true, ShortName = "-1K", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "-1K", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Lysbiotinhydrazide (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H15C10N3O2S", ID = 353, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "maleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H3C4NO2", ID = 773, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "maleimide (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H3C4NO2", ID = 773, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Maleimide-PEO2-Biotin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H35C23N5O7S", ID = 522, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "maleimide3 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H59C37N7O23", ID = 971, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "maleimide3 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H59C37N7O23", ID = 971, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "maleimide5 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H79C49N7O33", ID = 972, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "maleimide5 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H79C49N7O33", ID = 972, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Malonyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H2C3O3", ID = 747, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Malonyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H2C3O3", ID = 747, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MDCC (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H21C20N3O5", ID = 887, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Menadione (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C11O2", ID = 302, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Menadione (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C11O2", ID = 302, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Menadione-HQ (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H8C11O2", ID = 767, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Menadione-HQ (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C11O2", ID = 767, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MercaptoEthanol (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H4C2S", ID = 928, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MercaptoEthanol (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H4C2S", ID = 928, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Met->Aha (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "N3 - H3CS", ID = 896, 
-                 Structural = true, ShortName = "MAH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MAH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Met->Hpg (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "C - H2S", ID = 899, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Met-loss (Protein N-term M)", 
                  AAs = "M", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H9C5NOS", ID = 765, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Met-loss+Acetyl (Protein N-term M)", 
                  AAs = "M", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-H7C3NS", ID = 766, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (I)", 
                  AAs = "I", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "CH2", ID = 34, 
-                 Structural = true, ShortName = "1Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "1Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl+Acetyl:2H(3) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "HH'3C3O", ID = 768, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl+Deamidated (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "HCO - N", ID = 528, 
-                 Structural = true, ShortName = "MDe", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "MDe", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl+Deamidated (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "HCO - N", ID = 528, 
-                 Structural = true, ShortName = "MDe", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "MDe", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl-PEO12-Maleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H58C32N2O15", ID = 891, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl:2H(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'2C", ID = 284, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylamine (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H3CN - O", ID = 337, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylamine (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H3CN - O", ID = 337, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylmalonylation (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H4C4O3", ID = 914, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylphosphonate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H3CO2P", ID = 728, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylphosphonate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H3CO2P", ID = 728, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylphosphonate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H3CO2P", ID = 728, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylpyrroline (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H7C6NO", ID = 435, 
-                 Structural = true, ShortName = "MPr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MPr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylthio (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H2CS", ID = 39, 
-                 Structural = true, ShortName = "MSH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MSH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylthio (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2CS", ID = 39, 
-                 Structural = true, ShortName = "MSH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MSH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylthio (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H2CS", ID = 39, 
-                 Structural = true, ShortName = "MSH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MSH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methylthio (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H2CS", ID = 39, 
-                 Structural = true, ShortName = "MSH", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MSH", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MG-H1 (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H2C3O", ID = 859, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MM-diphenylpentanone (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H19C18NO", ID = 1315, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Molybdopterin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H11C10N5O8PS2Mo", ID = 391, 
-                 Structural = true, ShortName = "Mdt", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Mdt", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MolybdopterinGD (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H47C40N20O26P4S4Mo", ID = 424, 
-                 Structural = true, ShortName = "MGD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MGD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MolybdopterinGD (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H47C40N20O26P4S4Mo", ID = 424, 
-                 Structural = true, ShortName = "MGD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MGD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MolybdopterinGD+Delta:S(-1)Se(1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H47C40N20O26P4S3SeMo", ID = 415, 
-                 Structural = true, ShortName = "MtD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "MtD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "C7H12N2O", ID = 888, 
-                 Structural = true, ShortName = "M00", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "M00", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C7H12N2O", ID = 888, 
-                 Structural = true, ShortName = "M00", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "M00", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C7H12N2O", ID = 888, 
-                 Structural = true, ShortName = "M00", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "M00", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "MTSL (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H14C9NOS", ID = 911, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Myristoleyl (Protein N-term G)", 
                  AAs = "G", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H24C14O", ID = 134, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Myristoyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H26C14O", ID = 45, 
-                 Structural = true, ShortName = "Myr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Myr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Myristoyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H26C14O", ID = 45, 
-                 Structural = true, ShortName = "Myr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Myr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Myristoyl (N-term G)", 
                  AAs = "G", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H26C14O", ID = 45, 
-                 Structural = true, ShortName = "Myr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Myr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Myristoyl+Delta:H(-4) (Protein N-term G)", 
                  AAs = "G", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H22C14O", ID = 135, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Myristoyl+Delta:H(18)C(12)N(6)O(4) (N-term G)", 
                  AAs = "G", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H44C26N6O5", ID = 1333, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NA-LNO2 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H31C18NO4", ID = 685, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NA-LNO2 (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H31C18NO4", ID = 685, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NA-OA-NO2 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H33C18NO4", ID = 686, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NA-OA-NO2 (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H33C18NO4", ID = 686, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NBS (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H3C6NO2S", ID = 172, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NBS:13C(6) (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H3C'6NO2S", ID = 171, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NDA (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5C13N", ID = 457, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NDA (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H5C13N", ID = 457, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NEIAA (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C4NO", ID = 211, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NEIAA (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H7C4NO", ID = 211, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NEIAA:2H(5) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H2H'5C4NO", ID = 212, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NEIAA:2H(5) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H2H'5C4NO", ID = 212, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NEM:2H(5) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H2H'5C6NO2", ID = 776, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NEMsulfur (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C6NO2S", ID = 1326, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NEMsulfurWater (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO3S", ID = 1328, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nethylmaleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C6NO2", ID = 108, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nethylmaleimide+water (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO3", ID = 320, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nethylmaleimide+water (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO3", ID = 320, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NeuAc (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H17C11NO8", ID = 1303, 
-                 Structural = true, ShortName = "NAc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NeuAc (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H17C11NO8", ID = 1303, 
-                 Structural = true, ShortName = "NAc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NeuAc (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H17C11NO8", ID = 1303, 
-                 Structural = true, ShortName = "NAc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NeuGc (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "H17C11NO9", ID = 1304, 
-                 Structural = true, ShortName = "NGc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NGc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NeuGc (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H17C11NO9", ID = 1304, 
-                 Structural = true, ShortName = "NGc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NGc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NeuGc (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H17C11NO9", ID = 1304, 
-                 Structural = true, ShortName = "NGc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "NGc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NHS-LC-Biotin (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H25C16N3O3S", ID = 92, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NHS-LC-Biotin (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H25C16N3O3S", ID = 92, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NIC (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H3C6NO", ID = 697, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nitro (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "NO2 - H", ID = 354, 
-                 Structural = true, ShortName = "Ntr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Ntr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nitro (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "NO2 - H", ID = 354, 
-                 Structural = true, ShortName = "Ntr", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Ntr", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nitrosyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "NO - H", ID = 275, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nmethylmaleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H5C5NO2", ID = 314, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nmethylmaleimide (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5C5NO2", ID = 314, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Nmethylmaleimide+water (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H7C5NO3", ID = 500, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NO_SMX_SEMD (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H10C10N3O3S", ID = 744, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NO_SMX_SIMD (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H9C10N3O4S", ID = 746, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "NO_SMX_SMCT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H10C10N3O4S", ID = 745, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Dimethylphosphate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 723, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Dimethylphosphate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 723, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Dimethylphosphate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H5C2O3P", ID = 723, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Isopropylmethylphosphonate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H9C4O2P", ID = 729, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Isopropylmethylphosphonate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H9C4O2P", ID = 729, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Isopropylmethylphosphonate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H9C4O2P", ID = 729, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Methylphosphate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H3CO3P", ID = 724, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Methylphosphate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H3CO3P", ID = 724, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-Methylphosphate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H3CO3P", ID = 724, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-pinacolylmethylphosphonate (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H15C7O2P", ID = 727, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-pinacolylmethylphosphonate (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H15C7O2P", ID = 727, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-pinacolylmethylphosphonate (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H15C7O2P", ID = 727, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-pinacolylmethylphosphonate (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H15C7O2P", ID = 727, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "O-pinacolylmethylphosphonate (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H15C7O2P", ID = 727, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Octanoyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H14C8O", ID = 426, 
-                 Structural = true, ShortName = "Oct", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oct", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Octanoyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H14C8O", ID = 426, 
-                 Structural = true, ShortName = "Oct", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oct", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "OxArgBiotin (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H22C15N2O3S", ID = 116, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "OxArgBiotinRed (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H24C15N2O3S", ID = 117, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (C-term G)", 
                  AAs = "G", Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Oxidation (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "O", ID = 35, 
-                 Structural = true, ShortName = "Oxi", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Oxi", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "OxLysBiotin (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H24C16N4O3S", ID = 113, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "OxLysBiotinRed (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H26C16N4O3S", ID = 112, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "OxProBiotin (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "H27C16N5O3S", ID = 115, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "OxProBiotinRed (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "H29C16N5O3S", ID = 114, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Palmitoleyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H28C16O", ID = 431, 
-                 Structural = true, ShortName = "Pty", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pty", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Palmitoleyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H28C16O", ID = 431, 
-                 Structural = true, ShortName = "Pty", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pty", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Palmitoleyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H28C16O", ID = 431, 
-                 Structural = true, ShortName = "Pty", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pty", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Palmitoyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H30C16O", ID = 47, 
-                 Structural = true, ShortName = "Pal", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pal", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Palmitoyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H30C16O", ID = 47, 
-                 Structural = true, ShortName = "Pal", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pal", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Palmitoyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H30C16O", ID = 47, 
-                 Structural = true, ShortName = "Pal", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pal", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Palmitoyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H30C16O", ID = 47, 
-                 Structural = true, ShortName = "Pal", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pal", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PEITC (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H9C9NS", ID = 979, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PEITC (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C9NS", ID = 979, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PEITC (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H9C9NS", ID = 979, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Pentylamine (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.None, Formula = "H11C5N", ID = 801, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PEO-Iodoacetyl-LC-Biotin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H30C18N4O5S", ID = 20, 
-                 Structural = true, ShortName = "PEO", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "PEO", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PET (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H7C7NS - O", ID = 264, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PET (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H7C7NS - O", ID = 264, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phe->CamCys (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.None, Formula = "NOS - HC4", ID = 904, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phenylisocyanate (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C7H5NO", ID = 411, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phospho (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "HO3P", ID = 21, 
-                 Structural = true, ShortName = "Pho", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Pho", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phospho (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "HO3P", ID = 21, 
-                 Structural = true, ShortName = "Pho", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pho", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phospho (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "HO3P", ID = 21, 
-                 Structural = true, ShortName = "Pho", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pho", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phospho (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "HO3P", ID = 21, 
-                 Structural = true, ShortName = "Pho", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pho", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phospho (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "HO3P", ID = 21, 
-                 Structural = true, ShortName = "Pho", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pho", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphoadenosine (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H12C10N5O6P", ID = 405, 
-                 Structural = true, ShortName = "AMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphoadenosine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C10N5O6P", ID = 405, 
-                 Structural = true, ShortName = "AMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphoadenosine (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H12C10N5O6P", ID = 405, 
-                 Structural = true, ShortName = "AMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphoadenosine (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H12C10N5O6P", ID = 405, 
-                 Structural = true, ShortName = "AMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "AMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphogluconoylation (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H11C6O9P", ID = 1344, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphogluconoylation (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H11C6O9P", ID = 1344, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphoguanosine (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H12C10N5O7P", ID = 413, 
-                 Structural = true, ShortName = "GMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "GMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphoguanosine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C10N5O7P", ID = 413, 
-                 Structural = true, ShortName = "GMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "GMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PhosphoHex (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H11C6O8P", ID = 429, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PhosphoHexNAc (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H14C8NO8P", ID = 428, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PhosphoHexNAc (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H14C8NO8P", ID = 428, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphopantetheine (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H21C11N2O6PS", ID = 49, 
-                 Structural = true, ShortName = "PPE", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PPE", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphopropargyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H4C3NO2P", ID = 959, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphopropargyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H4C3NO2P", ID = 959, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phosphopropargyl (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H4C3NO2P", ID = 959, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "phosphoRibosyl (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H9C5N5O7P", ID = 1356, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "phosphoRibosyl (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H9C5N5O7P", ID = 1356, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "phosphoRibosyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H9C5N5O7P", ID = 1356, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PhosphoribosyldephosphoCoA (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H42C26N7O19P3S", ID = 395, 
-                 Structural = true, ShortName = "PRC", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PRC", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PhosphoUridine (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H11C9N2O8P", ID = 417, 
-                 Structural = true, ShortName = "UMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "UMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PhosphoUridine (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H11C9N2O8P", ID = 417, 
-                 Structural = true, ShortName = "UMP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "UMP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phycocyanobilin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H38C33N4O6", ID = 387, 
-                 Structural = true, ShortName = "pcb", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "pcb", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phycoerythrobilin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H40C33N4O6", ID = 388, 
-                 Structural = true, ShortName = "pct", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "pct", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phytochromobilin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H36C33N4O6", ID = 389, 
-                 Structural = true, ShortName = "pcm", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "pcm", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Piperidine (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C5", ID = 520, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Piperidine (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H8C5", ID = 520, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Pro->pyro-Glu (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "O - H2", ID = 359, 
-                 Structural = true, ShortName = "PGP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PGP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Pro->Pyrrolidinone (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "-H2CO", ID = 360, 
-                 Structural = true, ShortName = "PYD", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PYD", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Pro->Pyrrolidone (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "-CO", ID = 369, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "probiotinhydrazide (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.None, Formula = "H18C10N4O2S", ID = 357, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propargylamine (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "H3C3N - O", ID = 958, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propargylamine (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H3C3N - O", ID = 958, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propargylamine (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H3C3N - O", ID = 958, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionamide (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C3H5NO", ID = 24, 
-                 Structural = true, ShortName = "PPa", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PPa", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionamide (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C3H5NO", ID = 24, 
-                 Structural = true, ShortName = "PPa", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PPa", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C3H4O", ID = 58, 
-                 Structural = true, ShortName = "Poy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Poy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C3H4O", ID = 58, 
-                 Structural = true, ShortName = "Poy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Poy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionyl (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C3H4O", ID = 58, 
-                 Structural = true, ShortName = "Poy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Poy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionyl (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C3H4O", ID = 58, 
-                 Structural = true, ShortName = "Poy", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Poy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propiophenone (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H8C9O", ID = 1310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propiophenone (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H8C9O", ID = 1310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propiophenone (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C9O", ID = 1310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propiophenone (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H8C9O", ID = 1310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propiophenone (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H8C9O", ID = 1310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propiophenone (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H8C9O", ID = 1310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propiophenone (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "H8C9O", ID = 1310, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C3H6", ID = 1305, 
-                 Structural = true, ShortName = "Prp", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Prp", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C3H6", ID = 1305, 
-                 Structural = true, ShortName = "Prp", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Prp", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propyl:2H(6) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'6C3", ID = 1306, 
-                 Structural = true, ShortName = "Pr6", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pr6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propyl:2H(6) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'6C3", ID = 1306, 
-                 Structural = true, ShortName = "Pr6", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Pr6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PropylNAGthiazoline (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H14C9NO4S", ID = 514, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PS_Hapten (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H4C7O2", ID = 1345, 
-                 Structural = true, Hidden = true, PrecisionRequired = 3
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PS_Hapten (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H4C7O2", ID = 1345, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PS_Hapten (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C7O2", ID = 1345, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "pupylation (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H13C9N3O5", ID = 1264, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Puromycin (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "H27C22N7O4", ID = 973, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PyMIC (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H6C7N2O", ID = 501, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PyridoxalPhosphate (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C8NO5P", ID = 46, 
-                 Structural = true, ShortName = "PyP", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PyP", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Pyridylacetyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5C7NO", ID = 25, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Pyridylacetyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H5C7NO", ID = 25, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "pyrophospho (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H2O6P2", Losses = new [] { new FragmentLoss("H3O7P2"), }, ID = 898, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "pyrophospho (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H2O6P2", Losses = new [] { new FragmentLoss("H3O7P2"), }, ID = 898, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PyruvicAcidIminyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H2C3O2", ID = 422, 
-                 Structural = true, ShortName = "PAI", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PAI", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PyruvicAcidIminyl (Protein N-term C)", 
                  AAs = "C", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H2C3O2", ID = 422, 
-                 Structural = true, ShortName = "PAI", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PAI", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "PyruvicAcidIminyl (Protein N-term V)", 
                  AAs = "V", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H2C3O2", ID = 422, 
-                 Structural = true, ShortName = "PAI", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "PAI", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "QAT (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C9H19N2O", ID = 195, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "QEQTGG (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H36C23N8O11", ID = 876, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "QQQTGG (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H37C23N9O10", ID = 877, 
-                 Structural = true, ShortName = "SU2", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "SU2", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "QTGG (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H21C13N5O6", ID = 1293, 
-                 Structural = true, ShortName = "SU1", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "SU1", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Quinone (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "O2 - H2", ID = 392, 
-                 Structural = true, ShortName = "Qin", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Qin", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Quinone (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "O2 - H2", ID = 392, 
-                 Structural = true, ShortName = "Qin", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Qin", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Retinylidene (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H26C20", ID = 380, 
-                 Structural = true, ShortName = "Ret", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Ret", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Saligenin (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H6C7O", ID = 1254, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Saligenin (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C7O", ID = 1254, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SecCarbamidomethyl (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H3C2NOSe - S", ID = 1008, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SecNEM (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C6H7NO2Se - S", ID = 1033, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ser->LacticAcid (Protein N-term S)", 
                  AAs = "S", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "-HN", ID = 403, 
-                 Structural = true, ShortName = "SLA", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "SLA", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SMA (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO2", ID = 29, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SMA (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H9C6NO2", ID = 29, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SMCC-maleimide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H27C17N3O3", ID = 908, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SPITC (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C7H5NO3S2", ID = 261, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SPITC (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C7H5NO3S2", ID = 261, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Succinyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C4H4O3", ID = 64, 
-                 Structural = true, ShortName = "Suc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Suc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Succinyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C4H4O3", ID = 64, 
-                 Structural = true, ShortName = "Suc", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Suc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfanilicAcid (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "C6H5NO2S", ID = 285, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfanilicAcid (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "C6H5NO2S", ID = 285, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfanilicAcid (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "C6H5NO2S", ID = 285, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Sulfide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "S", ID = 421, 
-                 Structural = true, ShortName = "Sud", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "Sud", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Sulfide (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "S", ID = 421, 
-                 Structural = true, ShortName = "Sud", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Sud", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Sulfo (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "O3S", ID = 40, 
-                 Structural = true, ShortName = "SuO", Hidden = true, PrecisionRequired = 2
+                 Structural = true, ShortName = "SuO", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "sulfo+amino (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "HNO3S", ID = 997, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Sulfo-NHS-LC-LC-Biotin (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H36C22N4O4S", ID = 523, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Sulfo-NHS-LC-LC-Biotin (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H36C22N4O4S", ID = 523, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfoGMBS (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H26C22N4O5S", ID = 942, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfurDioxide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "O2S", ID = 1327, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SUMO2135 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H137C90N21O37S", ID = 960, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SUMO3549 (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H224C150N38O60S", ID = 961, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TAMRA-FP (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H46C37N3O6P", ID = 1038, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TAMRA-FP (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H46C37N3O6P", ID = 1038, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiadiazole (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H6C9N2S", ID = 1035, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiazolidine (N-term C)", 
                  AAs = "C", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C", ID = 1009, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thioacyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C3OS", ID = 126, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thioacyl (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H4C3OS", ID = 126, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "thioacylPA (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H9C6NO2S", ID = 967, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiophos-S-S-biotin (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H34C19N4O5PS3", Losses = new [] { new FragmentLoss("H34C19N4O5PS3"), }, ID = 332, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiophos-S-S-biotin (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H34C19N4O5PS3", Losses = new [] { new FragmentLoss("H34C19N4O5PS3"), }, ID = 332, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiophos-S-S-biotin (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H34C19N4O5PS3", Losses = new [] { new FragmentLoss("H34C19N4O5PS3"), }, ID = 332, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiophospho (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "HO2PS", ID = 260, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiophospho (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "HO2PS", ID = 260, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thiophospho (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "HO2PS", ID = 260, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thrbiotinhydrazide (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H16C10N4OS", ID = 361, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Thyroxine (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "C6OI4", ID = 398, 
-                 Structural = true, ShortName = "Trx", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Trx", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMAB (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H14C7NO", Losses = new [] { new FragmentLoss("H9C3N"), }, ID = 476, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMAB (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H14C7NO", Losses = new [] { new FragmentLoss("H9C3N"), }, ID = 476, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMAB:2H(9) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5H'9C7NO", Losses = new [] { new FragmentLoss("H'9C3N"), }, ID = 477, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMAB:2H(9) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H5H'9C7NO", Losses = new [] { new FragmentLoss("H'9C3N"), }, ID = 477, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMPP-Ac (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H33C29O10P", ID = 827, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H20C12N2O2", ID = 739, 
-                 Structural = true, ShortName = "TM0", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM0", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H20C12N2O2", ID = 739, 
-                 Structural = true, ShortName = "TM0", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM0", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H20C12N2O2", ID = 739, 
-                 Structural = true, ShortName = "TM0", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM0", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H20C12N2O2", ID = 739, 
-                 Structural = true, ShortName = "TM0", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM0", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H20C12N2O2", ID = 739, 
-                 Structural = true, ShortName = "TM0", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM0", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT2plex (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N2O2", ID = 738, 
-                 Structural = true, ShortName = "TM2", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM2", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT2plex (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N2O2", ID = 738, 
-                 Structural = true, ShortName = "TM2", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM2", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT2plex (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H20C11C'N2O2", ID = 738, 
-                 Structural = true, ShortName = "TM2", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM2", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT6plex (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H20C8C'4NN'O2", ID = 737, 
-                 Structural = true, ShortName = "TM6", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT6plex (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H20C8C'4NN'O2", ID = 737, 
-                 Structural = true, ShortName = "TM6", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TMT6plex (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H20C8C'4NN'O2", ID = 737, 
-                 Structural = true, ShortName = "TM6", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "TM6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TNBS (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "HC6N3O6", ID = 751, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "TNBS (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "HC6N3O6", ID = 751, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "trifluoro (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.None, Formula = "F3 - H3", ID = 750, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Triiodo (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "I3 - H3", ID = 131, 
-                 Structural = true, ShortName = "3Io", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Io", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Triiodothyronine (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "HC6OI3", ID = 397, 
-                 Structural = true, ShortName = "3IT", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3IT", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trimethyl (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H6C3", Losses = new [] { new FragmentLoss("H9C3N"), }, ID = 37, 
-                 Structural = true, ShortName = "3Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trimethyl (Protein N-term A)", 
                  AAs = "A", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H6C3", ID = 37, 
-                 Structural = true, ShortName = "3Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trimethyl (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H6C3", ID = 37, 
-                 Structural = true, ShortName = "3Me", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Me", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trioxidation (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "O3", ID = 345, 
-                 Structural = true, ShortName = "3Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trioxidation (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "O3", ID = 345, 
-                 Structural = true, ShortName = "3Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trioxidation (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "O3", ID = 345, 
-                 Structural = true, ShortName = "3Ox", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Ox", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Tripalmitate (Protein N-term C)", 
                  AAs = "C", Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H96C51O5", ID = 51, 
-                 Structural = true, ShortName = "3Pa", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "3Pa", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trp->Hydroxykynurenin (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "O2 - C", ID = 350, 
-                 Structural = true, ShortName = "HKy", Hidden = true, PrecisionRequired = 3
+                 Structural = true, ShortName = "HKy", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trp->Kynurenin (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "O - C", ID = 351, 
-                 Structural = true, ShortName = "Kyn", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "Kyn", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Trp->Oxolactone (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.None, Formula = "O - H2", ID = 288, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Tyr->Dha (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "-H6C6O", ID = 400, 
-                 Structural = true, ShortName = "YDA", Hidden = true, PrecisionRequired = 1
+                 Structural = true, ShortName = "YDA", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ub-amide (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H14C9N3O2", ID = 1260, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ub-Br2 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H8C4N2O", ID = 1257, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ub-fluorescein (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H29C31N6O7", ID = 1261, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Ub-VME (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H13C7N2O3", ID = 1258, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "UgiJoullie (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H60C47N23O10", ID = 1276, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "UgiJoullie (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H60C47N23O10", ID = 1276, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "UgiJoullieProGly (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H10C7N2O2", ID = 1282, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "UgiJoullieProGly (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H10C7N2O2", ID = 1282, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "UgiJoullieProGlyProGly (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H20C14N4O4", ID = 1283, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "UgiJoullieProGlyProGly (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H20C14N4O4", ID = 1283, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "VFQQQTGG (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H55C37N11O12", ID = 932, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "VIEVYQEQTGG (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H81C53N13O19", ID = 933, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Withaferin (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H38C28O6", ID = 1036, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:B10621 (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H30C31N4O6SI", ID = 323, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:DMP (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H10C7N2", ID = 456, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:DMP-de (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C7N2O", ID = 1027, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:DMP-s (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H14C8N2O", ID = 455, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:DSS (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C8O3", ID = 1020, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:DST (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H4C4O5", ID = 1022, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:DTSSP (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H8C6O3S2", ID = 1023, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:EGS (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H12C10O7", ID = 1021, 
-                 Structural = true, Hidden = true, PrecisionRequired = 2
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:EGScleaved (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H5C4NO2", ID = 1028, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:SMCC (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H15C12NO4", ID = 1024, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Xlink:SSD (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H15C12NO5", ID = 273, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ZGB (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H53C37N6O6F2SB", ID = 861, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ZGB (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H53C37N6O6F2SB", ID = 861, 
-                 Structural = true, Hidden = true, PrecisionRequired = 1
+                 Structural = true, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl:2H(3) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 56, 
-                 Structural = false, ShortName = "DAc", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl:2H(3) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 56, 
-                 Structural = false, ShortName = "DAc", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl:2H(3) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 56, 
-                 Structural = false, ShortName = "DAc", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl:2H(3) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 56, 
-                 Structural = false, ShortName = "DAc", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl:2H(3) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 56, 
-                 Structural = false, ShortName = "DAc", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Acetyl:2H(3) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 56, 
-                 Structural = false, ShortName = "DAc", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DAc", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEC-MAEC:2H(4) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 792, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "AEC-MAEC:2H(4) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 792, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Carboxymethyl:13C(2) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C'2 - C2", ID = 775, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(6) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 1291, 
-                 Structural = false, ShortName = "DM6", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DM6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(6) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 1291, 
-                 Structural = false, ShortName = "DM6", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DM6", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(6)13C(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'2H'6 - C2H6", ID = 330, 
-                 Structural = false, ShortName = "DM8", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DM8", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(6)13C(2) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'2H'6 - C2H6", ID = 330, 
-                 Structural = false, ShortName = "DM8", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DM8", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Dimethyl:2H(6)13C(2) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "C'2H'6 - C2H6", ID = 330, 
-                 Structural = false, ShortName = "DM8", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "DM8", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTT_C:2H(6) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 764, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTT_ST:2H(6) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 763, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "DTT_ST:2H(6) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 763, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "EQAT:2H(5) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H'5 - H5", ID = 198, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ESP:2H(10) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'10 - H10", ID = 91, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ESP:2H(10) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'10 - H10", ID = 91, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat:2H(3) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 61, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat:2H(3) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 61, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat:2H(6) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 62, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat:2H(6) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 62, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat:2H(9) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'9 - H9", ID = 63, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "GIST-Quat:2H(9) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'9 - H9", ID = 63, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-G:2H(8) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H'8 - H8", ID = 9, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICAT-H:13C(6) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C'6 - C6", ID = 124, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICDID:2H(6) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H'6 - H6", ID = 1019, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "ICPL:2H(4) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 687, 
-                 Structural = false, ShortName = "IP4", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "IP4", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IGBP:13C(2) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "C'2 - C2", ID = 499, 
-                 Structural = false, Hidden = true, PrecisionRequired = 2
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "IMID:2H(4) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 95, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(1)2H(3) (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "H'3C' - H3C", ID = 862, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(3) (A)", 
                  AAs = "A", LabelAtoms = LabelAtoms.C13, ID = 1296, 
-                 Structural = false, ShortName = "+3a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+3a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(3)15N(1) (A)", 
                  AAs = "A", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 1297, 
-                 Structural = false, ShortName = "+4a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+4a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(4) (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.None, Formula = "C'4 - C4", ID = 1266, 
-                 Structural = false, ShortName = "+4b", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+4b", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(4)15N(1) (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 1298, 
-                 Structural = false, ShortName = "+05", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+05", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(5) (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.C13, ID = 772, 
-                 Structural = false, Hidden = true, PrecisionRequired = 2
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(5)15N(1) (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 268, 
-                 Structural = false, ShortName = "+6a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+6a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(5)15N(1) (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 268, 
-                 Structural = false, ShortName = "+6a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+6a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(5)15N(1) (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 268, 
-                 Structural = false, ShortName = "+6a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+6a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(5)15N(1) (V)", 
                  AAs = "V", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 268, 
-                 Structural = false, ShortName = "+6a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+6a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6) (I)", 
                  AAs = "I", LabelAtoms = LabelAtoms.C13, ID = 188, 
-                 Structural = false, ShortName = "+06", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+06", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.C13, ID = 188, 
-                 Structural = false, ShortName = "+06", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+06", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6) (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.C13, ID = 188, 
-                 Structural = false, ShortName = "+06", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+06", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.C13, ID = 188, 
-                 Structural = false, ShortName = "+06", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+06", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(1) (I)", 
                  AAs = "I", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 695, 
-                 Structural = false, ShortName = "+07", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+07", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(1) (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 695, 
-                 Structural = false, ShortName = "+07", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+07", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 259, 
-                 Structural = false, ShortName = "+08", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+08", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(6)15N(4) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 267, 
-                 Structural = false, ShortName = "+10", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+10", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(9) (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.C13, ID = 184, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(9) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.C13, ID = 184, 
-                 Structural = false, Hidden = true, PrecisionRequired = 2
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:13C(9)15N(1) (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.C13|LabelAtoms.N15, ID = 269, 
-                 Structural = false, ShortName = "10a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "10a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (A)", 
                  AAs = "A", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (G)", 
                  AAs = "G", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (I)", 
                  AAs = "I", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (M)", 
                  AAs = "M", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (P)", 
                  AAs = "P", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (V)", 
                  AAs = "V", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(1) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.N15, ID = 994, 
-                 Structural = false, ShortName = "+01", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+01", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.N15, ID = 995, 
-                 Structural = false, ShortName = "+02", Hidden = true, PrecisionRequired = 3
+                 Structural = false, ShortName = "+02", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(2) (N)", 
                  AAs = "N", LabelAtoms = LabelAtoms.N15, ID = 995, 
-                 Structural = false, ShortName = "+02", Hidden = true, PrecisionRequired = 3
+                 Structural = false, ShortName = "+02", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(2) (Q)", 
                  AAs = "Q", LabelAtoms = LabelAtoms.N15, ID = 995, 
-                 Structural = false, ShortName = "+02", Hidden = true, PrecisionRequired = 3
+                 Structural = false, ShortName = "+02", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(2) (W)", 
                  AAs = "W", LabelAtoms = LabelAtoms.N15, ID = 995, 
-                 Structural = false, ShortName = "+02", Hidden = true, PrecisionRequired = 3
+                 Structural = false, ShortName = "+02", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(2)2H(9) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'9N'2 - H9N2", ID = 944, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(3) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.N15, ID = 996, 
-                 Structural = false, ShortName = "+03", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+03", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:15N(4) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.N15, ID = 897, 
-                 Structural = false, ShortName = "+04", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "+04", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:18O(1) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "O' - O", ID = 258, 
-                 Structural = false, ShortName = "Ob1", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "Ob1", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:18O(1) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "O' - O", ID = 258, 
-                 Structural = false, ShortName = "Ob1", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "Ob1", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:18O(1) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "O' - O", ID = 258, 
-                 Structural = false, ShortName = "Ob1", Hidden = true, PrecisionRequired = 2
+                 Structural = false, ShortName = "Ob1", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(10) (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.None, Formula = "H'10 - H10", ID = 1299, 
-                 Structural = false, ShortName = "D10", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "D10", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(3) (L)", 
                  AAs = "L", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 262, 
-                 Structural = false, ShortName = "D03", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "D03", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(4) (F)", 
                  AAs = "F", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 481, 
-                 Structural = false, ShortName = "D04", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "D04", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(4) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 481, 
-                 Structural = false, ShortName = "D04", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "D04", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(4) (Y)", 
                  AAs = "Y", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 481, 
-                 Structural = false, ShortName = "D04", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "D04", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(4)13C(1) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "H'4C' - H4C", ID = 1300, 
-                 Structural = false, ShortName = "+5a", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "+5a", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Label:2H(9)13C(6)15N(2) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'9C'6N'2 - H9C6N2", ID = 696, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl:2H(3) (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 298, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl:2H(3) (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 298, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl:2H(3) (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 298, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Methyl:2H(3)13C(1) (R)", 
                  AAs = "R", LabelAtoms = LabelAtoms.None, Formula = "C'H'3 - CH3", ID = 329, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(3)15N(1) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "C'3N' - C3N", ID = 889, 
-                 Structural = false, ShortName = "M04", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "M04", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(3)15N(1) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C'3N' - C3N", ID = 889, 
-                 Structural = false, ShortName = "M04", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "M04", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(3)15N(1) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C'3N' - C3N", ID = 889, 
-                 Structural = false, ShortName = "M04", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "M04", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(6)15N(2) (H)", 
                  AAs = "H", LabelAtoms = LabelAtoms.None, Formula = "C'6N'2 - C6N2", ID = 1302, 
-                 Structural = false, ShortName = "M08", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "M08", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(6)15N(2) (S)", 
                  AAs = "S", LabelAtoms = LabelAtoms.None, Formula = "C'6N'2 - C6N2", ID = 1302, 
-                 Structural = false, ShortName = "M08", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "M08", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "mTRAQ:13C(6)15N(2) (T)", 
                  AAs = "T", LabelAtoms = LabelAtoms.None, Formula = "C'6N'2 - C6N2", ID = 1302, 
-                 Structural = false, ShortName = "M08", Hidden = true, PrecisionRequired = 1
+                 Structural = false, ShortName = "M08", Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Phenylisocyanate:2H(5) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'5 - H5", ID = 412, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionamide:2H(3) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 97, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionyl:13C(3) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'3 - C3", ID = 59, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Propionyl:13C(3) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'3 - C3", ID = 59, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "QAT:2H(3) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H'3 - H3", ID = 196, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SecNEM:2H(5) (C)", 
                  AAs = "C", LabelAtoms = LabelAtoms.None, Formula = "H'5 - H5", ID = 1034, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SPITC:13C(6) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'6 - C6", ID = 464, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SPITC:13C(6) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'6 - C6", ID = 464, 
-                 Structural = false, Hidden = true, PrecisionRequired = 2
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Succinyl:13C(4) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "C'4 - C4", ID = 66, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Succinyl:13C(4) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "C'4 - C4", ID = 66, 
-                 Structural = false, Hidden = true, PrecisionRequired = 2
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Succinyl:2H(4) (K)", 
                  AAs = "K", LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 65, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "Succinyl:2H(4) (N-term)", 
                  Terminus = ModTerminus.N, LabelAtoms = LabelAtoms.None, Formula = "H'4 - H4", ID = 65, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfanilicAcid:13C(6) (C-term)", 
                  Terminus = ModTerminus.C, LabelAtoms = LabelAtoms.None, Formula = "C'6 - C6", ID = 286, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfanilicAcid:13C(6) (D)", 
                  AAs = "D", LabelAtoms = LabelAtoms.None, Formula = "C'6 - C6", ID = 286, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             new UniModModificationData
             {
                  Name = "SulfanilicAcid:13C(6) (E)", 
                  AAs = "E", LabelAtoms = LabelAtoms.None, Formula = "C'6 - C6", ID = 286, 
-                 Structural = false, Hidden = true, PrecisionRequired = 1
+                 Structural = false, Hidden = true, 
             },
             
             // Hardcoded Skyline Mods
diff --git a/pwiz_tools/Skyline/Properties/Settings.cs b/pwiz_tools/Skyline/Properties/Settings.cs
index 8a16974bb1..43432ee68e 100644
--- a/pwiz_tools/Skyline/Properties/Settings.cs
+++ b/pwiz_tools/Skyline/Properties/Settings.cs
@@ -1636,7 +1636,7 @@ public sealed class StaticModList : SettingsList<StaticMod>
             new StaticMod(UniModData.DEFAULT.Name, UniModData.DEFAULT.AAs, UniModData.DEFAULT.Terminus, false,
                 UniModData.DEFAULT.Formula, UniModData.DEFAULT.LabelAtoms,
                 RelativeRT.Matching, null, null, UniModData.DEFAULT.Losses, UniModData.DEFAULT.ID,
-                UniModData.DEFAULT.ShortName, null)
+                UniModData.DEFAULT.ShortName)
         };
 
         public static StaticMod[] GetDefaultsOn()
diff --git a/pwiz_tools/Skyline/Test/ModificationMatcherTest.cs b/pwiz_tools/Skyline/Test/ModificationMatcherTest.cs
index a05055b519..883eeb4467 100644
--- a/pwiz_tools/Skyline/Test/ModificationMatcherTest.cs
+++ b/pwiz_tools/Skyline/Test/ModificationMatcherTest.cs
@@ -412,7 +412,7 @@ private static ResultsTestDocumentContainer InitMatchDocContainer(TestFilesDir t
         private static readonly StaticMod LABEL15_N = new StaticMod("Label:15N", null, null, LabelAtoms.N15);
         private static readonly StaticMod MET_OX_ROUNDED = new StaticMod("Met Ox Rounded", "M", null, null, LabelAtoms.None, 16.0, 16.0);
         private static readonly StaticMod N_TERM_LABEL = new StaticMod("Label:13C(6)15N(2) (K)", "K", null, false, null, LabelAtoms.C13|LabelAtoms.N15, 
-                                                                        RelativeRT.Matching, null,null, null, 259, "+08", null);
+                                                                        RelativeRT.Matching, null,null, null, 259, "+08");
 
         private static List<string> _seqs;
         private static void InitSeqs()