«P-selectin is a protein that in humans is encoded by the SELPgene.
P-selectin functions as a cell adhesion molecule (CAM) on the surfaces of activated endothelial cell, which line the inner surface of blood vessels, and activated platelets. In unactivated endothelial cell, it is stored in granules called Weibel-Palade bodies. In unactivated platelets P-selectin is stored in α-granules.
Other names for P-selectin include CD62P, Granule Membrane Protein 140 (GMP-140), and Platelet Activation-Dependent Granule to External Membrane Protein (PADGEM). It was first identified in endothelial cell in 1989.» (wikipedia)