CD42a FITC

Description: The GR-P monoclonal antibody reacts with human CD42a, which is also known as glycoprotein IX (GPIX). CD42a is a 22-kDa transmembrane protein that is constitutively expressed on platelets and megakaryocytes. CD42a associates with CD42b, CD42c, and CD42d to form the GPIb-V-IX complex, which binds von Willebrand factor, an endothelial adhesion protein, to mediate platelet adhesion and activation. This binding results in platelet aggregation at sites of vascular injury. This receptor complex has also been demonstrated to bind thrombin, factors XI and XII, P-selectin, and Mac-1.

References: Hickey MJ, Williams SA, Roth GJ. Human platelet glycoprotein IX: an adhesive prototype of leucine-rich glycoproteins with flank-center-flank structures. Proc Natl Acad Sci U S A. 1989 Sep;86(17):6773-7.

Schlossman S, Bloumsell L, et al, eds. Leucocyte Typing V: White Cell Differentiation Antigens. Oxford University Press. New York. 1995.