This antibody recognises the human CD20 cell surface antigen. (The target epitope has been mapped to the sequence found in the large extracellular loop of human CD20: YNCEPANPSEKNSPST.)
CD20 is a 33-37kD phosphoprotein. CD20 is expressed by B lymphocytes and by a small subset of normal circulating T lymphocytes.Synonyms: B-cell marker, B-lymphocyte antigen CD20, B-lymphocyte surface antigen B1, Bp35, Leu-16, MS4A1, Membrane-spanning 4-domains subfamily A member 1