GET /api/unimod/?format=api&offset=1000
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "count": 1543,
    "next": "https://cinder.proteo.info/api/unimod/?format=api&limit=20&offset=1020",
    "previous": "https://cinder.proteo.info/api/unimod/?format=api&limit=20&offset=980",
    "results": [
        {
            "accession": "UNIMOD:253",
            "name": "Crotonaldehyde",
            "definition": "Crotonaldehyde.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(6) C(4) O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "fatcat"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "70.0898"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "70.041865"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "H"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "253"
                },
                {
                    "id": "spec_3_site",
                    "description": "K"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-08-12 19:56:03"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 10:35:31"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:254",
            "name": "Delta:H(2)C(2)",
            "definition": "Acetaldehyde +26.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(2) C(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "fatcat"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "26.0373"
                },
                {
                    "id": "spec_4_position",
                    "description": "Any N-term"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "H"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_3_position",
                    "description": "Protein N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "26.01565"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "K"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "254"
                },
                {
                    "id": "spec_3_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Other"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-08-12 20:01:03"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-11-21 13:14:17"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:255",
            "name": "Delta:H(4)C(2)",
            "definition": "Acetaldehyde +28.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(4) C(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "fatcat"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "28.0532"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "H"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_3_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "28.0313"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "K"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "255"
                },
                {
                    "id": "spec_3_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-08-12 20:02:38"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-11-21 13:14:58"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:256",
            "name": "Delta:H(4)C(3)",
            "definition": "Propionaldehyde +40.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(4) C(3)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "fatcat"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "40.0639"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "H"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_3_position",
                    "description": "Protein N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "40.0313"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "K"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "256"
                },
                {
                    "id": "spec_3_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-08-12 20:04:01"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2010-02-25 10:49:55"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:258",
            "name": "Label:18O(1)",
            "definition": "O18 Labeling.",
            "additional_data": [
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_2_misc_notes",
                    "description": "alkaline phosphatase to dephosphorylate"
                },
                {
                    "id": "spec_4_position",
                    "description": "Any C-term"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "S"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "2.004246"
                },
                {
                    "id": "spec_4_misc_notes",
                    "description": "digesting in labelled water"
                },
                {
                    "id": "spec_3_misc_notes",
                    "description": "alkaline phosphatase to dephosphorylate"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "0"
                },
                {
                    "id": "spec_2_site",
                    "description": "T"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "alkaline phosphatase to dephosphorylate"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_3_site",
                    "description": "Y"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-08-27 21:57:17"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                },
                {
                    "id": "delta_composition",
                    "description": "O(-1) 18O"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "chemgirl18"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "1.9998"
                },
                {
                    "id": "spec_4_site",
                    "description": "C-term"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "record_id",
                    "description": "258"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-13 18:53:41"
                }
            ]
        },
        {
            "accession": "UNIMOD:259",
            "name": "Label:13C(6)15N(2)",
            "definition": "13C(6) 15N(2) Silac label.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "C(-6) 13C(6) N(-2) 15N(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "hs01"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "7.9427"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "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 experiment"
                },
                {
                    "id": "record_id",
                    "description": "259"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "8.014199"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-08-30 16:23:02"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2014-06-09 09:40:49"
                }
            ]
        },
        {
            "accession": "UNIMOD:26",
            "name": "Pyro-carbamidomethyl",
            "definition": "S-carbamoylmethylcysteine cyclization (N-terminus).",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "C(2) O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "40.0208"
                },
                {
                    "id": "group_of_poster",
                    "description": "admin"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "0"
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Artefact"
                },
                {
                    "id": "record_id",
                    "description": "26"
                },
                {
                    "id": "spec_1_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "39.994915"
                },
                {
                    "id": "date_time_posted",
                    "description": "2002-08-19 19:17:11"
                },
                {
                    "id": "approved",
                    "description": "0"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-11-14 11:05:25"
                }
            ]
        },
        {
            "accession": "UNIMOD:260",
            "name": "Thiophospho",
            "definition": "Thiophosphorylation.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H O(2) P S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "mrbladergroen"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "96.0455"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "S"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Other"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "95.943487"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "T"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Other"
                },
                {
                    "id": "record_id",
                    "description": "260"
                },
                {
                    "id": "spec_3_site",
                    "description": "Y"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-09-01 13:20:58"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 12:38:48"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                }
            ]
        },
        {
            "accession": "UNIMOD:261",
            "name": "SPITC",
            "definition": "4-sulfophenyl isothiocyanate.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(5) C(7) N O(3) S(2)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "hatlevig"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "215.2495"
                },
                {
                    "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": "214.971084"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "N-term"
                },
                {
                    "id": "record_id",
                    "description": "261"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-09-14 20:01:29"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 15:26:00"
                }
            ]
        },
        {
            "accession": "UNIMOD:262",
            "name": "Label:2H(3)",
            "definition": "Trideuteration.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-3) 2H(3)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "mmolloy"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "3.0185"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "L"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "3.01883"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "M"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "for SILAC expt"
                },
                {
                    "id": "record_id",
                    "description": "262"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-09-29 08:52:01"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2013-02-22 12:42:11"
                }
            ]
        },
        {
            "accession": "UNIMOD:264",
            "name": "PET",
            "definition": "Phosphorylation to pyridyl thiol.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(7) C(7) N O(-1) S"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "vbad"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "121.2028"
                },
                {
                    "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": "delta_mono_mass",
                    "description": "121.035005"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "T"
                },
                {
                    "id": "record_id",
                    "description": "264"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-10-07 08:55:33"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 12:48:51"
                }
            ]
        },
        {
            "accession": "UNIMOD:267",
            "name": "Label:13C(6)15N(4)",
            "definition": "13C(6) 15N(4) Silac label.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "C(-6) 13C(6) N(-4) 15N(4)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "AFCS"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "9.9296"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "R"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Used in SILAC experiment"
                },
                {
                    "id": "record_id",
                    "description": "267"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "10.008269"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-10-20 17:49:33"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-19 10:30:51"
                }
            ]
        },
        {
            "accession": "UNIMOD:268",
            "name": "Label:13C(5)15N(1)",
            "definition": "13C(5) 15N(1) Silac label.",
            "additional_data": [
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_2_misc_notes",
                    "description": "Result of conversion of 13C6, 15N4 arginine to 13C5, 15N1 proline"
                },
                {
                    "id": "spec_4_position",
                    "description": "Anywhere"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "V"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_3_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "6.013809"
                },
                {
                    "id": "spec_3_misc_notes",
                    "description": "SILAC label used in COFRADIC"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "P"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Used in AQUA experiment"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_3_site",
                    "description": "M"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-11-05 18:49:37"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                },
                {
                    "id": "delta_composition",
                    "description": "C(-5) 13C(5) N(-1) 15N"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "Deepa"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "5.9567"
                },
                {
                    "id": "spec_4_site",
                    "description": "E"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "record_id",
                    "description": "268"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "date_time_modified",
                    "description": "2011-11-21 14:48:39"
                }
            ]
        },
        {
            "accession": "UNIMOD:269",
            "name": "Label:13C(9)15N(1)",
            "definition": "13C(9) 15N(1) Silac label.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "C(-9) 13C(9) N(-1) 15N"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "Deepa"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "9.9273"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_site",
                    "description": "F"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Isotopic label"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "Used in AQUA experiment"
                },
                {
                    "id": "record_id",
                    "description": "269"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "10.027228"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-11-05 18:51:13"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-19 10:31:10"
                }
            ]
        },
        {
            "accession": "UNIMOD:27",
            "name": "Glu->pyro-Glu",
            "definition": "Pyro-glu from E.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-2) O(-1)"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "unimod"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "-18.0153"
                },
                {
                    "id": "group_of_poster",
                    "description": "admin"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "0"
                },
                {
                    "id": "spec_1_site",
                    "description": "E"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Artefact"
                },
                {
                    "id": "record_id",
                    "description": "27"
                },
                {
                    "id": "spec_1_position",
                    "description": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "-18.010565"
                },
                {
                    "id": "date_time_posted",
                    "description": "2002-08-19 19:17:11"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2008-06-05 13:54:56"
                }
            ]
        },
        {
            "accession": "UNIMOD:270",
            "name": "Cytopiloyne",
            "definition": "Nucleophilic addtion to cytopiloyne.",
            "additional_data": [
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_5_group",
                    "description": "5"
                },
                {
                    "id": "spec_4_position",
                    "description": "Anywhere"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "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": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "362.136553"
                },
                {
                    "id": "spec_6_site",
                    "description": "S"
                },
                {
                    "id": "spec_7_group",
                    "description": "7"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "K"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_5_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_5_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_6_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_3_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_7_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-11-10 03:13:23"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                },
                {
                    "id": "delta_composition",
                    "description": "H(22) C(19) O(7)"
                },
                {
                    "id": "spec_7_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "ymchiang"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "362.3738"
                },
                {
                    "id": "spec_4_site",
                    "description": "P"
                },
                {
                    "id": "spec_5_site",
                    "description": "R"
                },
                {
                    "id": "spec_7_site",
                    "description": "Y"
                },
                {
                    "id": "spec_5_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "record_id",
                    "description": "270"
                },
                {
                    "id": "spec_7_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_6_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_6_group",
                    "description": "6"
                },
                {
                    "id": "spec_6_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 16:35:54"
                }
            ]
        },
        {
            "accession": "UNIMOD:271",
            "name": "Cytopiloyne+water",
            "definition": "Nucleophilic addition to cytopiloyne+H2O.",
            "additional_data": [
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_5_group",
                    "description": "5"
                },
                {
                    "id": "spec_4_position",
                    "description": "Anywhere"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "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": "Any N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "380.147118"
                },
                {
                    "id": "spec_6_site",
                    "description": "T"
                },
                {
                    "id": "spec_7_group",
                    "description": "7"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "K"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_5_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_5_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_6_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_3_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_7_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-11-11 05:23:17"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                },
                {
                    "id": "delta_composition",
                    "description": "H(24) C(19) O(8)"
                },
                {
                    "id": "spec_7_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "ymchiang"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "380.3891"
                },
                {
                    "id": "spec_4_site",
                    "description": "R"
                },
                {
                    "id": "spec_5_site",
                    "description": "S"
                },
                {
                    "id": "spec_7_site",
                    "description": "Y"
                },
                {
                    "id": "spec_5_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "record_id",
                    "description": "271"
                },
                {
                    "id": "spec_7_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_6_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "spec_6_group",
                    "description": "6"
                },
                {
                    "id": "spec_6_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 16:37:10"
                }
            ]
        },
        {
            "accession": "UNIMOD:272",
            "name": "CAF",
            "definition": "Sulfonation of N-terminus.",
            "additional_data": [
                {
                    "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:275",
            "name": "Nitrosyl",
            "definition": "Nitrosylation.",
            "additional_data": [
                {
                    "id": "delta_composition",
                    "description": "H(-1) N O"
                },
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_2_misc_notes",
                    "description": "photochemical decomposition"
                },
                {
                    "id": "username_of_poster",
                    "description": "dengh"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "28.9982"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "C"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Post-translational"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Chemical derivative"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "28.990164"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "Y"
                },
                {
                    "id": "spec_1_misc_notes",
                    "description": "S-nitrosylation"
                },
                {
                    "id": "record_id",
                    "description": "275"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-12-11 00:23:12"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "date_time_modified",
                    "description": "2019-09-10 09:17:23"
                }
            ]
        },
        {
            "accession": "UNIMOD:276",
            "name": "AEBS",
            "definition": "Aminoethylbenzenesulfonylation.",
            "additional_data": [
                {
                    "id": "spec_1_group",
                    "description": "1"
                },
                {
                    "id": "spec_5_group",
                    "description": "5"
                },
                {
                    "id": "spec_4_position",
                    "description": "Anywhere"
                },
                {
                    "id": "group_of_poster",
                    "description": "users"
                },
                {
                    "id": "spec_1_site",
                    "description": "H"
                },
                {
                    "id": "spec_1_classification",
                    "description": "Artefact"
                },
                {
                    "id": "spec_2_group",
                    "description": "2"
                },
                {
                    "id": "spec_2_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_2_classification",
                    "description": "Artefact"
                },
                {
                    "id": "spec_3_position",
                    "description": "Protein N-term"
                },
                {
                    "id": "delta_mono_mass",
                    "description": "183.035399"
                },
                {
                    "id": "spec_4_misc_notes",
                    "description": "Primary site of modification"
                },
                {
                    "id": "spec_2_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_4_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_2_site",
                    "description": "K"
                },
                {
                    "id": "spec_3_classification",
                    "description": "Artefact"
                },
                {
                    "id": "spec_5_classification",
                    "description": "Artefact"
                },
                {
                    "id": "spec_5_hidden",
                    "description": "1"
                },
                {
                    "id": "spec_3_site",
                    "description": "N-term"
                },
                {
                    "id": "spec_4_group",
                    "description": "4"
                },
                {
                    "id": "date_time_posted",
                    "description": "2004-12-14 04:38:25"
                },
                {
                    "id": "approved",
                    "description": "1"
                },
                {
                    "id": "spec_3_group",
                    "description": "3"
                },
                {
                    "id": "delta_composition",
                    "description": "H(9) C(8) N O(2) S"
                },
                {
                    "id": "spec_3_hidden",
                    "description": "1"
                },
                {
                    "id": "username_of_poster",
                    "description": "plattm"
                },
                {
                    "id": "delta_avge_mass",
                    "description": "183.2276"
                },
                {
                    "id": "spec_4_site",
                    "description": "S"
                },
                {
                    "id": "spec_5_site",
                    "description": "Y"
                },
                {
                    "id": "spec_5_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_1_hidden",
                    "description": "1"
                },
                {
                    "id": "record_id",
                    "description": "276"
                },
                {
                    "id": "spec_1_position",
                    "description": "Anywhere"
                },
                {
                    "id": "spec_4_classification",
                    "description": "Artefact"
                },
                {
                    "id": "date_time_modified",
                    "description": "2006-10-16 15:04:42"
                }
            ]
        }
    ]
}