CD5 Proteins and Enzymes

CD5, also known as Leu-1, is a glycoprotein expressed on thymocytes, mature T cells and the B1a subpopulation of B cells. CD5 binds the C-type lectin, CD72, and modulates signaling through antigen receptors on T and B cells. CD5 is a member of the scavenger receptor cysteine-rich (SRCR) family.