{"code":"C569","name":"IgM","terminology":"ncit","version":"26.09d","conceptStatus":"DEFAULT","leaf":false,"active":true,"synonyms":[{"name":"IgM","termType":"DN","type":"FULL_SYN","typeCode":"P90","source":"CTRP"},{"name":"IgM","termType":"PT","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Immunoglobulin M","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"IgM","type":"Display_Name","typeCode":"P107"},{"name":"IgM","type":"Preferred_Name","typeCode":"P108"}],"definitions":[{"definition":"The major immunoglobulin secreted during a primary immune response.  IgM binds with low affinity but high avidity (multiple binding sites) because it not only occurs as monomers but also as pentamers and hexamers.","code":"P97","type":"DEFINITION","source":"NCI"}],"properties":[{"code":"P322","type":"Contributing_Source","value":"CTRP"},{"code":"P366","type":"Legacy Concept Name","value":"IgM"},{"code":"P106","type":"Semantic_Type","value":"Amino Acid, Peptide, or Protein"},{"code":"P106","type":"Semantic_Type","value":"Immunologic Factor"},{"code":"P207","type":"UMLS_CUI","value":"C0020861"}]}