we have studied the effect of the tumor-promoting phorbol ester , 4 beta-phorbol-12 beta-myristate-13 a-acetate ( pma ) , and of the stable prostaglandin endoperoxide analogue u46619 on the interaction of human blood platelets with surfaces coated with monomeric human type v collagen ( cv ) and on free calcium concentration in platelet cytoplasm .
C0031586
phorbol ester
C0039654
pma