( b ) the total number of surface gpiib/iiia sites increased by only 2-10 % with activation as judged by equilibrium binding of near-saturating concentrations of 10e5 and 7e3 , and ( c ) there was less than 1 % release of platelet factor 4 with activation , indicating minimal fusion of alpha-granule membranes ( a potential source of gpiib/iiia ) with the plasma membrane .
C0016011
gpiib/iiia
C0007603
plasma membrane