CD72, His, Human

CD72 (originally Lyb-2), a 45 kDa type II transmembrane glycoprotein. CD72 belongs to the calcium-dependent C-type lectin superfamily and shares sequence homology with CD23 (the B-cell-specific low-affinity Fc receptor for IgE) and the asialoglycoprotein receptors. It is expressed as a disulfide-linked homodimer from the pro-B through the mature B-cell stage, but it is downregulated on terminally differentiated plasma cells.