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                    "id": "delta_composition",
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            "accession": "UNIMOD:1226",
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            "accession": "UNIMOD:676",
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                    "id": "delta_composition",
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                    "id": "username_of_poster",
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                    "id": "delta_avge_mass",
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            "definition": "Trp->His substitution.",
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                    "id": "delta_composition",
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                    "id": "delta_composition",
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                    "id": "delta_composition",
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                    "description": "2006-11-09 12:42:22"
                }
            ]
        },
        {
            "accession": "UNIMOD:1234",
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                {
                    "id": "delta_composition",
                    "description": "H(-3) C(-7) N(-1) O"
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            ]
        },
        {
            "accession": "UNIMOD:1236",
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            "definition": "Trp->Tyr substitution.",
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                    "id": "delta_composition",
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                },
                {
                    "id": "record_id",
                    "description": "1236"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "-23.015984"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-06-23 11:44:18"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-06-23 11:44:18"
                }
            ]
        },
        {
            "accession": "UNIMOD:1235",
            "name": "Trp->Val",
            "definition": "Trp->Val substitution.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-1) C(-6) N(-1)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "-87.0788"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "W"
                },
                {
                    "id": "spec_1_classification",
                    "description": "AA substitution"
                },
                {
                    "id": "record_id",
                    "description": "1235"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "-87.010899"
                },
                {
                    "id": "date_time_posted",
                    "description": "2011-06-23 11:43:54"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-06-23 11:43:54"
                }
            ]
        },
        {
            "accession": "UNIMOD:677",
            "name": "Trp->Xle",
            "definition": "Trp->Leu/Ile substitution.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H C(-5) N(-1)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "-73.0523"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "W"
                },
                {
                    "id": "spec_1_classification",
                    "description": "AA substitution"
                },
                {
                    "id": "record_id",
                    "description": "677"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "-72.995249"
                },
                {
                    "id": "date_time_posted",
                    "description": "2006-11-09 12:43:49"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-06-21 15:08:09"
                }
            ]
        },
        {
            "accession": "UNIMOD:1834",
            "name": "Tween20",
            "definition": "Tween 20 synthetic polymer terminus.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(21) C(12)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "165.2951"
                },
                {
                    "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": "1834"
                },
                {
                    "id": "spec_1_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "165.164326"
                },
                {
                    "id": "date_time_posted",
                    "description": "2016-08-22 14:51:41"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2016-08-22 16:07:18"
                }
            ]
        },
        {
            "accession": "UNIMOD:1835",
            "name": "Tween80",
            "definition": "Tween 80 synthetic polymer terminus.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(31) C(18) O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "263.4381"
                },
                {
                    "id": "group_of_poster",
                    "description": ""
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "C-term"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "1835"
                },
                {
                    "id": "spec_1_position",
                    "description": "Any C-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "263.237491"
                },
                {
                    "id": "date_time_posted",
                    "description": "2016-08-22 14:52:52"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2016-08-22 16:08:10"
                }
            ]
        }
    ]
}