{
  "meta": {
    "disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
    "terms": "https://open.fda.gov/terms/",
    "license": "https://open.fda.gov/license/",
    "last_updated": "2025-09-19",
    "results": {
      "skip": 0,
      "limit": 1,
      "total": 1
    }
  },
  "results": [
    {
      "codes": [
        {
          "uuid": "b2c8832f-ecee-239c-acbb-ee4c0cb1c7a5",
          "code": "C444",
          "type": "PRIMARY",
          "url": "https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C444",
          "code_system": "NCI_THESAURUS",
          "references": [
            "069e22ce-4308-f9bf-897d-f1e2a3367137"
          ]
        },
        {
          "uuid": "ee051129-9c14-4491-b71d-99804cbde36d",
          "code": "8LV40J44ZI",
          "type": "PRIMARY",
          "code_system": "FDA UNII"
        },
        {
          "uuid": "c8b71663-2cf2-4abe-9265-f34f6e673e65",
          "code": "EC 2.4.2.36",
          "type": "PRIMARY",
          "url": "https://enzyme.expasy.org/EC/2.4.2.36",
          "code_system": "EC (ENZYME CLASS)",
          "references": [
            "7b54527e-8f4f-7b43-cfc0-07fbef498aeb"
          ]
        },
        {
          "uuid": "c6ff5963-3ff0-4f02-bb6f-d76447773a4e",
          "code": "P00588",
          "type": "PRIMARY",
          "url": "https://www.uniprot.org/uniprot/P00588",
          "code_system": "UNIPROT",
          "references": [
            "4be8d63a-80a0-1cfc-05d6-df24495d4077"
          ]
        },
        {
          "uuid": "9aa06fe6-f669-4cf7-a5fe-9ada51558f21",
          "code": "1523010-93-6",
          "type": "GENERIC (FAMILY)",
          "url": "https://commonchemistry.cas.org/detail?cas_rn=1523010-93-6",
          "code_system": "CAS",
          "references": [
            "446312aa-26f5-a07f-a75d-132b22a46ad2"
          ]
        }
      ],
      "substance_class": "protein",
      "names": [
        {
          "uuid": "fefcd24a-1591-25ef-097a-16b571c4070f",
          "name": "DIPHTHERIA TOXIN (CORYNEPHAGE BETA)",
          "stdName": "DIPHTHERIA TOXIN (CORYNEPHAGE BETA)",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "4be8d63a-80a0-1cfc-05d6-df24495d4077"
          ],
          "display_name": true
        },
        {
          "uuid": "a2d196e5-170d-0da3-dd3c-e3b258672c17",
          "name": "DIPHTHERIA TOXIN FRAGMENTS A/FRAGMENT B",
          "stdName": "DIPHTHERIA TOXIN FRAGMENTS A/FRAGMENT B",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "4be8d63a-80a0-1cfc-05d6-df24495d4077"
          ],
          "display_name": false
        },
        {
          "uuid": "0369fc27-cd30-f23c-5a37-1dddd1e7f93f",
          "name": "DT",
          "stdName": "DT",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "4be8d63a-80a0-1cfc-05d6-df24495d4077"
          ],
          "display_name": false
        },
        {
          "uuid": "d2865488-c79c-ad70-c4da-74053a1250b2",
          "name": "NAD(+)--DIPHTHAMIDE ADP-RIBOSYLTRANSFERASE",
          "stdName": "NAD(+)--DIPHTHAMIDE ADP-RIBOSYLTRANSFERASE",
          "type": "cn",
          "languages": [
            "en"
          ],
          "preferred": false,
          "references": [
            "4be8d63a-80a0-1cfc-05d6-df24495d4077"
          ],
          "display_name": false
        }
      ],
      "references": [
        {
          "uuid": "446312aa-26f5-a07f-a75d-132b22a46ad2",
          "citation": "STN",
          "doc_type": "STN (SCIFINDER)",
          "public_domain": true
        },
        {
          "uuid": "4be8d63a-80a0-1cfc-05d6-df24495d4077",
          "citation": "https://www.uniprot.org/uniprot/P00588",
          "url": "https://www.uniprot.org/uniprot/P00588",
          "doc_type": "UNIPROT",
          "public_domain": true,
          "tags": [
            "NOMEN",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "7b54527e-8f4f-7b43-cfc0-07fbef498aeb",
          "citation": "https://enzyme.expasy.org/EC/2.4.2.36",
          "doc_type": "WEB PAGE",
          "public_domain": true
        },
        {
          "uuid": "827470c1-4562-55c4-6e4e-995950b6ce68",
          "citation": "Smith, Heidi L., et al. \"Potency of a human monoclonal antibody to diphtheria toxin relative to equine diphtheria anti-toxin in a guinea pig intoxication model.\" Virulence 7.6 (2016): 660-668.",
          "url": "https://www.tandfonline.com/doi/full/10.1080/21505594.2016.1171436",
          "doc_type": "JA",
          "public_domain": true,
          "tags": [
            "POT",
            "PUBLIC_DOMAIN_RELEASE"
          ]
        },
        {
          "uuid": "069e22ce-4308-f9bf-897d-f1e2a3367137",
          "citation": "NCIT",
          "doc_type": "NCI THESAURUS",
          "public_domain": true
        }
      ],
      "definition_type": "PRIMARY",
      "protein": {
        "uuid": "280b8da7-fe96-4134-9abd-9058862b7218",
        "glycosylation": {
          "uuid": "168ff7f0-fea9-40dd-b927-48679647b9c3"
        },
        "subunits": [
          {
            "uuid": "0dd0675c-2d74-4793-9e99-7c099fa598c6",
            "sequence": "SVGSSLSCINLDWDVIRDKTKTKIESLKEHGPIKNKMSESPNKTVSEEKAKQYLEEFHQTALEHPELSELKTVTGTNPVFAGANYAAWAVNVAQVIDSETADNLEKTTAALSILPGIGSVMGIADGAVHHNTEEIVAQSIALSSLMVAQAIPLVGELVDIGFAAYNFVESIINLFQVVHNSYNRPAYSPGHKTQPFLHDGYAVSWNTVEDSIIRTGFQGESGHDIKITAENTPLPIAGVLLPTIPGKLDVNKSKTHISVNGRKIRMRCRAIDGDVTFCRPKSPVYVGNGVHANLHVAFHRSSSEKIHSNEISSDSIGVLGYQKTVDHTKVNSKLSLFFEIKS",
            "subunit_index": 1
          },
          {
            "uuid": "9f2f3e44-08d7-41c7-a5aa-b518051dac2b",
            "sequence": "GADDVVDSSKSFVMENFSSYHGTKPGYVDSIQKGIQKPKSGTQGNYDDDWKGFYSTDNKYDAAGYSVDNENPLSGKAGGVVKVTYPGLTKVLALKVDNAETIKKELGLSLTEPLMEQVGTEEFIKRFGDGASRVVLSLPFAEGSSSVEYINNWEQAKALSVELEINFETRGKRGQDAMYEYMAQACAGNRVRR",
            "subunit_index": 2
          }
        ],
        "references": [
          "4be8d63a-80a0-1cfc-05d6-df24495d4077"
        ],
        "disulfide_links": [
          {
            "sites": [
              {
                "residue_index": 8,
                "subunit_index": 1
              },
              {
                "residue_index": 186,
                "subunit_index": 2
              }
            ]
          },
          {
            "sites": [
              {
                "residue_index": 268,
                "subunit_index": 1
              },
              {
                "residue_index": 278,
                "subunit_index": 1
              }
            ]
          }
        ],
        "protein_sub_type": "",
        "protein_type": "TOXIN",
        "sequence_origin": "BACTERIAL",
        "sequence_type": "COMPLETE"
      },
      "definition_level": "COMPLETE",
      "uuid": "da6bd23d-50ef-4c06-b8ff-f8971603506b",
      "version": "7",
      "properties": [
        {
          "uuid": "8ce84d4a-7cde-4f4b-8e97-8fd17d57a95c",
          "name": "MOL_WEIGHT:NUMBER(CALCULATED)",
          "type": "amount",
          "value": {
            "uuid": "e59d1d64-71c1-45cf-9950-54346c631b5c",
            "type": "ESTIMATED",
            "average": 58400,
            "units": "Da"
          },
          "defining": false,
          "property_type": "CHEMICAL"
        },
        {
          "uuid": "ca3f8cb5-94a9-4777-ba8b-5ae1b4c8728b",
          "name": "Molecular Formula",
          "value": {
            "uuid": "e628cef4-e631-4531-b4d0-20b6ee43b3ca",
            "type": "ESTIMATED",
            "non_numeric_value": "C2582H4033N705O812S12"
          },
          "defining": false,
          "property_type": "CHEMICAL"
        }
      ],
      "unii": "8LV40J44ZI"
    }
  ]
}