<unk> , or<unk>  for short, is a basic antibody that is present on B cells. It is the primary antibody against A and B antigens on red blood cells.<unk>  is by far the physically largest antibody in the human circulatory system.
Immunoglobulin M
Immunoglobulin G
Immunoglobulin A
Immunoglobulin E
Immunoglobulin D
Immunoglobulin heavy chain
Gamma globulin
Light chain