The CD5 (HISM2) Antibody recognizes a 67 kDa type-I single-chain transmembrane glycoprotein. CD5 antigen is early e, Xenopus/Amphibian,pressed during thymocyte development and is displayed on all mature T lymphocytes, on a small subset of peripheral B lymphocytes, and on most Ig+ B-chronic lymphoblastic leukemia (B-CLL) cells. CD5 is a ligand for the CD72 antigen e, Xenopus/Amphibian,pressed on B lymphocytes and is involved in T cell signaling, activation,Porcineroliferation and interaction with B cells.