Gene ontology ID
GO:0071754
Definition
A polymer of five or six IgM core units each composed of two identical immunoglobulin heavy chains of the IgM isotype and two identical immunoglobulin light chains, held together by disulfide bonds; the individual IgM core units are held together via disulfide bonds with a single J chain polypeptide acting as a bridge between two of the polymeric units. Circulating IgM is present in the extracellular space, in mucosal areas or other tissues, or in the blood or lymph
Comment
Note that an IgM immunoglobulin complex has the function of antigen binding if a suitable antigen is available.
Synonyms
1. IgM antibody
References
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is an element of the parent element
is a part of the parent element
is related to the parent element
derives from the parent element
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at least 1 tissue/ enzyme/ localization link in this branch
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tissue/ enzyme/ localization link to BRENDA