Lexic.us

Definition of IgM

1. Noun. One of the five major classes of immunoglobulins; involved in fighting blood infections and in triggering production of immunoglobulin G.

Definition of IgM

1. Acronym. (medicine biology) immunoglobulin M ¹

¹ Source: wiktionary.com

Medical Definition of IgM

1. An immunoglobulin M molecule (970 kD) is built up from five immunoglobulin G type monomers joined together, with the assistance of J chains, to form a cyclic pentamer. Immunoglobulin M binds complement and a single molecule bound to a cell surface can lyse that cell. Immunoglobulin M is usually produced first in an immune response before immunoglobulin G. The human red cell isoantibodies are immunoglobulin M antibodies. Heavy chain (mu chain) is rather larger than the heavy chains of other immunoglobulins. (30 Mar 1998)

Lexicographical Neighbors of IgM

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