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        {
            "accession": "UNIMOD:1039",
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                {
                    "id": "delta_composition",
                    "description": "H(37) C(23) N(5) O(8) S"
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                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
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                {
                    "id": "delta_avge_mass",
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                    "id": "group_of_poster",
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                    "id": "spec_1_hidden",
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                {
                    "id": "spec_1_site",
                    "description": "C"
                },
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                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
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                    "id": "record_id",
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                },
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                    "id": "spec_1_position",
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                },
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                    "id": "delta_mono_mass",
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                },
                {
                    "id": "date_time_posted",
                    "description": "2011-05-18 16:28:42"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-05-25 16:02:07"
                }
            ]
        },
        {
            "accession": "UNIMOD:1340",
            "name": "Biotin:Thermo-21911",
            "definition": "Biotin-PEG11-maleimide.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(71) C(41) N(5) O(16) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "Jolein_Gloerich"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "922.0913"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
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                {
                    "id": "spec_1_hidden",
                    "description": "1"
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                {
                    "id": "spec_1_site",
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                {
                    "id": "record_id",
                    "description": "1340"
                },
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                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "921.461652"
                },
                {
                    "id": "date_time_posted",
                    "description": "2012-06-26 17:49:31"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2012-07-14 19:02:40"
                }
            ]
        },
        {
            "accession": "UNIMOD:1251",
            "name": "Biotin:Thermo-33033",
            "definition": "Sulfo-SBED Label Photoreactive Biotin Crosslinker.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(36) C(25) N(6) O(4) S(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "Magnojunqueira"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "548.7211"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
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                {
                    "id": "spec_1_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Sulfo-SBED Label Transfer ReagentrnReaction path that does not remove one Hidrogen atom from the target peptide"
                },
                {
                    "id": "record_id",
                    "description": "1251"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "548.223945"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-06-24 16:58:05"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2013-04-16 23:21:26"
                }
            ]
        },
        {
            "accession": "UNIMOD:1252",
            "name": "Biotin:Thermo-33033-H",
            "definition": "Sulfo-SBED Label Photoreactive Biotin Crosslinker minus Hydrogen.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(34) C(25) N(6) O(4) S(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "Magnojunqueira"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "546.7053"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Sulfo-SBED Label Transfer Reagent. Reaction path that removes one Hydrogen atom from the target peptide"
                },
                {
                    "id": "record_id",
                    "description": "1252"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "546.208295"
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                {
                    "id": "date_time_posted",
                    "description": "2011-06-24 17:01:13"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-06-24 21:16:06"
                }
            ]
        },
        {
            "accession": "UNIMOD:1031",
            "name": "Biotin:Thermo-88310",
            "definition": "Desthiobiotin modification of lysine.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(16) C(10) N(2) O(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "rbomgard"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "196.2462"
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                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "1031"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "196.121178"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-03-02 20:33:20"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
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                    "id": "date_time_modified",
                    "description": "2015-04-20 16:11:56"
                }
            ]
        },
        {
            "accession": "UNIMOD:1037",
            "name": "Biotin:Thermo-88317",
            "definition": "Desthiobiotin fluorophosphonate.",
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                {
                    "id": "delta_composition",
                    "description": "H(42) C(22) N(3) O(4) P"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "rbomgard"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "443.5603"
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                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_site",
                    "description": "Y"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
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                    "id": "spec_2_classification",
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                {
                    "id": "delta_mono_mass",
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                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "S"
                },
                {
                    "id": "record_id",
                    "description": "1037"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-05-06 19:40:48"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2015-04-20 16:24:29"
                }
            ]
        },
        {
            "accession": "UNIMOD:1830",
            "name": "Biotin-tyramide",
            "definition": "Biotin-Phenol.",
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                {
                    "id": "delta_composition",
                    "description": "H(23) C(18) N(3) O(3) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_2_misc_notes",
                    "description": "Only observed on a small fraction of residues (~2%). See doi: 10.1038/nmeth.4465"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
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                {
                    "id": "delta_avge_mass",
                    "description": "361.4585"
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                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_site",
                    "description": "Y"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
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                {
                    "id": "spec_3_misc_notes",
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                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "C"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "1830"
                },
                {
                    "id": "spec_3_site",
                    "description": "W"
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                    "id": "spec_1_position",
                    "description": "Anywhere"
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                    "id": "date_time_posted",
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                },
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                    "description": "2023-02-24 12:26:35"
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                    "id": "spec_3_group",
                    "description": "3"
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        },
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            "accession": "UNIMOD:519",
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                {
                    "id": "delta_composition",
                    "description": "H(22) C(32) N(2) O(6) S(2)"
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                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "app95d"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "594.6569"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "519"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "594.091928"
                },
                {
                    "id": "date_time_posted",
                    "description": "2006-07-05 23:31:08"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2012-05-15 20:15:06"
                }
            ]
        },
        {
            "accession": "UNIMOD:1330",
            "name": "bisANS-sulfonates",
            "definition": "BisANS with loss of both sulfonates.",
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                {
                    "id": "delta_composition",
                    "description": "H(22) C(32) N(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "app95d"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "434.5305"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "434.178299"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "S"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "1330"
                },
                {
                    "id": "spec_3_site",
                    "description": "T"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2012-05-22 21:55:58"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2021-07-06 12:33:24"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:978",
            "name": "BITC",
            "definition": "Benzyl isothiocyanate.",
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                {
                    "id": "delta_composition",
                    "description": "H(7) C(8) N S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "miyoshin"
                },
                {
                    "id": "delta_avge_mass",
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                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "id": "spec_1_classification",
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                },
                {
                    "id": "spec_2_group",
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                },
                {
                    "id": "spec_2_position",
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                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_3_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "149.02992"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "K"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "978"
                },
                {
                    "id": "spec_3_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2010-03-09 09:42:12"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2013-04-26 06:26:47"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:1281",
            "name": "BMP-piperidinol",
            "definition": "1-methyl-3-benzoyl-4-hydroxy-4-phenylpiperidine.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(17) C(18) N O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "Areej"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "263.3337"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_site",
                    "description": "M"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "263.131014"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "C"
                },
                {
                    "id": "record_id",
                    "description": "1281"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-10-12 12:22:26"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2012-01-13 15:44:30"
                }
            ]
        },
        {
            "accession": "UNIMOD:1837",
            "name": "Brij35",
            "definition": "Brij 35 synthetic polymer terminus.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(24) C(12)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "168.319"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "1837"
                },
                {
                    "id": "spec_1_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "168.187801"
                },
                {
                    "id": "date_time_posted",
                    "description": "2016-08-22 14:55:48"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2016-08-22 16:07:31"
                }
            ]
        },
        {
            "accession": "UNIMOD:1838",
            "name": "Brij58",
            "definition": "Brij 58 synthetic polymer terminus.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(32) C(16)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "224.4253"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "1838"
                },
                {
                    "id": "spec_1_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "224.250401"
                },
                {
                    "id": "date_time_posted",
                    "description": "2016-08-22 14:56:22"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2016-08-22 16:08:02"
                }
            ]
        },
        {
            "accession": "UNIMOD:340",
            "name": "Bromo",
            "definition": "Bromination.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-1) Br"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "gerribe"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "78.8961"
                },
                {
                    "id": "spec_4_position",
                    "description": "Anywhere"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "W"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_site",
                    "description": "Y"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "77.910511"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "H"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "record_id",
                    "description": "340"
                },
                {
                    "id": "spec_3_site",
                    "description": "F"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Artefact"
                },
                {
                    "id": "date_time_posted",
                    "description": "2005-09-06 08:31:51"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-11-21 12:07:51"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:301",
            "name": "Bromobimane",
            "definition": "Monobromobimane derivative.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(10) C(10) N(2) O(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "catsriku"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "190.1986"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "301"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "190.074228"
                },
                {
                    "id": "date_time_posted",
                    "description": "2005-04-04 23:03:13"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 15:07:49"
                }
            ]
        },
        {
            "accession": "UNIMOD:1289",
            "name": "Butyryl",
            "definition": "Butyryl.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(6) C(4) O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "70.0898"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "record_id",
                    "description": "1289"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "70.041865"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-11-21 12:06:20"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2024-08-12 10:01:08"
                }
            ]
        },
        {
            "accession": "UNIMOD:513",
            "name": "C8-QAT",
            "definition": "[3-(2,5)-Dioxopyrrolidin-1-yloxycarbonyl)-propyl]dimethyloctylammonium.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(29) C(14) N O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "amadian"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "227.3862"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Any N-term"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "227.224915"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "N-term"
                },
                {
                    "id": "record_id",
                    "description": "513"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2006-05-13 20:55:20"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-12-03 19:43:27"
                }
            ]
        },
        {
            "accession": "UNIMOD:272",
            "name": "CAF",
            "definition": "Sulfonation of N-terminus.",
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                {
                    "id": "delta_composition",
                    "description": "H(4) C(3) O(4) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "chens002"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "136.1265"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "272"
                },
                {
                    "id": "spec_1_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "135.983029"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-11-16 14:25:33"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2007-01-03 19:34:35"
                }
            ]
        },
        {
            "accession": "UNIMOD:293",
            "name": "CAMthiopropanoyl",
            "definition": "3-(carbamidomethylthio)propanoyl.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(7) C(5) N O(2) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "vanschra"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "145.1796"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Protein N-term"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "145.019749"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "N-term"
                },
                {
                    "id": "record_id",
                    "description": "293"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2005-03-09 15:22:46"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 13:58:55"
                }
            ]
        },
        {
            "accession": "UNIMOD:333",
            "name": "Can-FP-biotin",
            "definition": "6-N-biotinylaminohexyl isopropyl phosphate.",
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                {
                    "id": "delta_composition",
                    "description": "H(34) C(19) N(3) O(5) P S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "lmschopfer"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "447.5291"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "S"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "447.195679"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "Y"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "333"
                },
                {
                    "id": "spec_3_site",
                    "description": "T"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2005-07-21 20:54:00"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2010-12-03 16:24:45"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        }
    ]
}