Immunoglobulin M

**Definition:** A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin.

**Tree numbers:** - D12.776.124.486.485.114.619.574 - D12.776.124.790.651.114.619.574 - D12.776.377.715.548.114.619.574

**Synonyms:** - Gamma Globulin, 19S - IgM - IgM Antibody