"constant region" meaning in English

{
  "forms": [
    {
      "form": "constant regions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "constant region (plural constant regions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Biochemistry",
          "orig": "en:Biochemistry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Immunology",
          "orig": "en:Immunology",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Molecular biology",
          "orig": "en:Molecular biology",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The portion of an antibody whose amino acid sequence is relatively conserved within an isotype, forming the structural and functional domains that do not vary between different antibodies of the same class."
      ],
      "id": "en-constant_region-en-noun-hEvtiUot",
      "links": [
        [
          "immunology",
          "immunology"
        ],
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "molecular biology",
          "molecular biology"
        ],
        [
          "antibody",
          "antibody"
        ],
        [
          "amino acid",
          "amino acid"
        ],
        [
          "isotype",
          "isotype"
        ]
      ],
      "qualifier": "molecular biology",
      "raw_glosses": [
        "(immunology, biochemistry, molecular biology) The portion of an antibody whose amino acid sequence is relatively conserved within an isotype, forming the structural and functional domains that do not vary between different antibodies of the same class."
      ],
      "related": [
        {
          "word": "variable region"
        },
        {
          "word": "heavy chain"
        },
        {
          "word": "light chain"
        },
        {
          "word": "Fc region"
        },
        {
          "word": "Fab region"
        }
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "immunology",
        "medicine",
        "microbiology",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "constant region"
}

{
  "forms": [
    {
      "form": "constant regions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "constant region (plural constant regions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "variable region"
    },
    {
      "word": "heavy chain"
    },
    {
      "word": "light chain"
    },
    {
      "word": "Fc region"
    },
    {
      "word": "Fab region"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Biochemistry",
        "en:Immunology",
        "en:Molecular biology"
      ],
      "glosses": [
        "The portion of an antibody whose amino acid sequence is relatively conserved within an isotype, forming the structural and functional domains that do not vary between different antibodies of the same class."
      ],
      "links": [
        [
          "immunology",
          "immunology"
        ],
        [
          "biochemistry",
          "biochemistry"
        ],
        [
          "molecular biology",
          "molecular biology"
        ],
        [
          "antibody",
          "antibody"
        ],
        [
          "amino acid",
          "amino acid"
        ],
        [
          "isotype",
          "isotype"
        ]
      ],
      "qualifier": "molecular biology",
      "raw_glosses": [
        "(immunology, biochemistry, molecular biology) The portion of an antibody whose amino acid sequence is relatively conserved within an isotype, forming the structural and functional domains that do not vary between different antibodies of the same class."
      ],
      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "immunology",
        "medicine",
        "microbiology",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ]
    }
  ],
  "word": "constant region"
}