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                    "description": "2006-11-14 11:15:06"
                }
            ]
        },
        {
            "accession": "UNIMOD:928",
            "name": "MercaptoEthanol",
            "definition": "2-OH-ethyl thio-Ser.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(4) C(2) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "cbatthya"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "60.1182"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "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": "delta_mono_mass",
                    "description": "60.003371"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "T"
                },
                {
                    "id": "record_id",
                    "description": "928"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2009-09-17 20:43:13"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2009-10-02 18:23:38"
                }
            ]
        },
        {
            "accession": "UNIMOD:926",
            "name": "ethylamino",
            "definition": "Ethyl amino.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(5) C(2) N O(-1)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "cbatthya"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "27.0684"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "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": "delta_mono_mass",
                    "description": "27.047285"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "T"
                },
                {
                    "id": "record_id",
                    "description": "926"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2009-09-17 20:37:18"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2009-10-02 18:21:10"
                }
            ]
        },
        {
            "accession": "UNIMOD:923",
            "name": "Label:13C(4)15N(2)+GG",
            "definition": "13C(4) 15N(2) Lysine glygly.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(6) 13C(4) 15N(2) O(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "mpcusack"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "120.0601"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Used in SILAC PTM (glygly) experiment"
                },
                {
                    "id": "record_id",
                    "description": "923"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "120.050417"
                },
                {
                    "id": "date_time_posted",
                    "description": "2009-09-16 21:04:07"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2014-07-09 16:53:30"
                }
            ]
        },
        {
            "accession": "UNIMOD:92",
            "name": "NHS-LC-Biotin",
            "definition": "NHS-LC-Biotin.",
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                {
                    "id": "delta_composition",
                    "description": "H(25) C(16) N(3) O(3) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "toppolzer"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "339.453"
                },
                {
                    "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": "339.161662"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "N-term"
                },
                {
                    "id": "record_id",
                    "description": "92"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2002-12-04 09:55:19"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2015-05-07 10:57:59"
                }
            ]
        },
        {
            "accession": "UNIMOD:914",
            "name": "Methylmalonylation",
            "definition": "Methylmalonylation on Serine.",
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                {
                    "id": "delta_composition",
                    "description": "H(4) C(4) O(3)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "xwei"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "100.0728"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "S"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "914"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "100.016044"
                },
                {
                    "id": "date_time_posted",
                    "description": "2009-07-15 23:43:13"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2010-11-24 17:59:18"
                }
            ]
        },
        {
            "accession": "UNIMOD:912",
            "name": "HNE-BAHAH",
            "definition": "4-hydroxy-2-nonenal and biotinamidohexanoic acid hydrazide, reduced.",
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                {
                    "id": "delta_composition",
                    "description": "H(45) C(25) N(5) O(4) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "hooverdm"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "511.7209"
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                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "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": "511.319226"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "H"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "record_id",
                    "description": "912"
                },
                {
                    "id": "spec_3_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2009-07-13 18:23:28"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2009-07-17 17:49:45"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:911",
            "name": "MTSL",
            "definition": "Cys modification by (1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-methyl)methanesulfonate (MTSL).",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(14) C(9) N O S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "Kramerh"
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                {
                    "id": "delta_avge_mass",
                    "description": "184.2786"
                },
                {
                    "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": "911"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "184.07961"
                },
                {
                    "id": "date_time_posted",
                    "description": "2009-06-25 20:19:40"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2009-06-26 11:13:49"
                }
            ]
        }
    ]
}