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            "accession": "UNIMOD:391",
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                {
                    "id": "delta_composition",
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                    "id": "spec_1_group",
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            "accession": "UNIMOD:1315",
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                    "id": "delta_composition",
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                    "id": "username_of_poster",
                    "description": "Areej"
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                    "id": "spec_1_classification",
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            "accession": "UNIMOD:448",
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                    "id": "record_id",
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                    "id": "username_of_poster",
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                    "id": "date_time_modified",
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        {
            "accession": "UNIMOD:1150",
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                    "id": "delta_composition",
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            "accession": "UNIMOD:1146",
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                },
                {
                    "id": "date_time_posted",
                    "description": "2011-06-21 16:30:07"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-06-21 16:30:07"
                }
            ]
        },
        {
            "accession": "UNIMOD:2033",
            "name": "Met+O(2)",
            "definition": "Photo-induced Methionine Adduct.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(9) C(5) N O(3) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "tomp1808"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "163.1949"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "H"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Oxidative cross-link of free methionine to histidine residue in protein."
                },
                {
                    "id": "record_id",
                    "description": "2033"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "163.030314"
                },
                {
                    "id": "date_time_posted",
                    "description": "2021-02-01 10:35:58"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2021-03-09 13:26:40"
                }
            ]
        },
        {
            "accession": "UNIMOD:613",
            "name": "Met->Lys",
            "definition": "Met->Lys substitution.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(3) C N S(-1)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "-3.0238"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "M"
                },
                {
                    "id": "spec_1_classification",
                    "description": "AA substitution"
                },
                {
                    "id": "record_id",
                    "description": "613"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "-2.945522"
                },
                {
                    "id": "date_time_posted",
                    "description": "2006-11-09 11:28:29"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-11-09 11:28:29"
                }
            ]
        },
        {
            "accession": "UNIMOD:766",
            "name": "Met-loss+Acetyl",
            "definition": "Removal of initiator methionine from protein N-terminus, then acetylation of the new N-terminus.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-7) C(-3) N(-1) S(-1)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "chalkley"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "-89.1594"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "M"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Co-translational"
                },
                {
                    "id": "record_id",
                    "description": "766"
                },
                {
                    "id": "spec_1_position",
                    "description": "Protein N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "-89.02992"
                },
                {
                    "id": "date_time_posted",
                    "description": "2007-07-10 22:57:12"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2007-07-15 20:01:06"
                }
            ]
        },
        {
            "accession": "UNIMOD:765",
            "name": "Met-loss",
            "definition": "Removal of initiator methionine from protein N-terminus.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-9) C(-5) N(-1) O(-1) S(-1)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "chalkley"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "-131.1961"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "M"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Co-translational"
                },
                {
                    "id": "record_id",
                    "description": "765"
                },
                {
                    "id": "spec_1_position",
                    "description": "Protein N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "-131.040485"
                },
                {
                    "id": "date_time_posted",
                    "description": "2007-07-10 22:40:00"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2007-07-15 20:01:35"
                }
            ]
        },
        {
            "accession": "UNIMOD:39",
            "name": "Methylthio",
            "definition": "Beta-methylthiolation.",
            "additional_data": [
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_5_group",
                    "description": "5"
                },
                {
                    "id": "spec_4_position",
                    "description": "Any N-term"
                },
                {
                    "id": "group_of_poster",
                    "description": "admin"
                },
                {
                    "id": "spec_1_site",
                    "description": "D"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "45.987721"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "N"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Multiple"
                },
                {
                    "id": "spec_5_classification",
                    "description": "Artefact"
                },
                {
                    "id": "spec_5_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_3_site",
                    "description": "C"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "date_time_posted",
                    "description": "2002-08-19 19:17:11"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                },
                {
                    "id": "delta_composition",
                    "description": "H(2) C S"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "0"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "46.0916"
                },
                {
                    "id": "spec_4_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_5_site",
                    "description": "K"
                },
                {
                    "id": "spec_5_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "record_id",
                    "description": "39"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Artefact"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-11-24 16:48:21"
                }
            ]
        }
    ]
}