CD42a [A9]

The CD42a antibody recognizes a 17 to 22-kilodalton (kDa) single-chain, platelet membrane glycoprotein, also known as gpIX that forms a noncovalent complex with gpIb and gpV. Glycoprotein Ib consists of an α–chain disulfide-linked to a β chain. Glycoproteins Ibα (140 to 145 kDa), Ibβ (24 to 25 kDa), and V (82 to 86 kDa) have been designated as CD42b, CD42c and CD42d respectively. CD42a has been reported to react with both gpIX and the gpIb-IX-V complex.