CD20 (3E9D) Antibody

CD20 (B-lymphocyte antigen CD20) is a 33-37 kDa type-III non-glycosylated phosphoprotein spanning the cell membrane four times therefore also called TM4. CD20 antigen is expressed on pre-B cells, resting/activated B cells and corresponding neoplastic B cells, but is absent from plasma cells. CD20 regulates B lymphocyte activation and proliferation.