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                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "1261"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "597.209772"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-07-01 13:49:56"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-07-12 14:28:20"
                }
            ]
        },
        {
            "accession": "UNIMOD:1262",
            "name": "2-dimethylsuccinyl",
            "definition": "S-(2-dimethylsuccinyl) cysteine.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(8) C(6) O(4)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "JMcGouran"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "144.1253"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "1262"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "144.042259"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-07-06 10:55:02"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-07-12 14:25:02"
                }
            ]
        },
        {
            "accession": "UNIMOD:1263",
            "name": "Gly",
            "definition": "Addition of Glycine.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(3) C(2) N O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "kstampe2"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "57.0513"
                },
                {
                    "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": "57.021464"
                },
                {
                    "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": "1263"
                },
                {
                    "id": "spec_3_site",
                    "description": "T"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-07-07 16:37:10"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2020-10-05 09:16:08"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:1264",
            "name": "pupylation",
            "definition": "Addition of GGE.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(13) C(9) N(3) O(5)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "hbromage"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "243.2166"
                },
                {
                    "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": "1264"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "243.085521"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-07-13 21:34:29"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-07-24 12:24:34"
                }
            ]
        },
        {
            "accession": "UNIMOD:1266",
            "name": "Label:13C(4)",
            "definition": "13C4 Methionine label.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "C(-4) 13C(4)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "BThomas"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "3.9706"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "M"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "record_id",
                    "description": "1266"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "4.013419"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-07-27 09:55:40"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-12-07 10:49:13"
                }
            ]
        },
        {
            "accession": "UNIMOD:1267",
            "name": "Label:13C(4)+Oxidation",
            "definition": "Oxidised 13C4 labelled Methionine.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "C(-4) 13C(4) O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "BThomas"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "19.97"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "M"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "record_id",
                    "description": "1267"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "20.008334"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-07-27 10:10:30"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-08-05 14:17:17"
                }
            ]
        },
        {
            "accession": "UNIMOD:127",
            "name": "Fluoro",
            "definition": "Fluorination.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-1) F"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "jschulte"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "17.9905"
                },
                {
                    "id": "spec_4_position",
                    "description": "Anywhere"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "F"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Non-standard residue"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_site",
                    "description": "A"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Non-standard residue"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "17.990578"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "W"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Non-standard residue"
                },
                {
                    "id": "record_id",
                    "description": "127"
                },
                {
                    "id": "spec_3_site",
                    "description": "Y"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "date_time_posted",
                    "description": "2003-06-19 19:54:25"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2012-11-20 11:56:44"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:1270",
            "name": "HCysThiolactone",
            "definition": "N-Homocysteine thiolactone.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(7) C(4) N O S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "alejandro"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "117.1695"
                },
                {
                    "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": "spec_1_misc_notes",
                    "description": "N-Homocysteine thiolactone is an acylating agent and can react with the E amino group of lysine residues"
                },
                {
                    "id": "record_id",
                    "description": "1270"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "117.024835"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-09-15 19:31:10"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2014-12-01 10:35:27"
                }
            ]
        },
        {
            "accession": "UNIMOD:1271",
            "name": "HCysteinyl",
            "definition": "S-homocysteinylation.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(7) C(4) N O(2) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "alejandro"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "133.1689"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Homocysteine can take part in disulfide exchange reactions with S-S bonds in proteins, thus forming S-homocysteinylated proteins"
                },
                {
                    "id": "record_id",
                    "description": "1271"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "133.019749"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-09-15 19:36:44"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2024-08-12 10:20:05"
                }
            ]
        }
    ]
}