An IgM immunoglobulin complex that is present in the plasma membrane of B cells and is composed of two identical immunoglobulin heavy chains of the IgM isotype and two identical immunoglobulin light chains and a signaling subunit, a heterodimer of the Ig-alpha and Ig-beta proteins.
Source:ISBN:0781765196,
GOC:add,
PMID:20176268
Comment
Note that an IgM immunoglobulin complex has the function of antigen binding if a suitable antigen is available.