by the use of a series of monoclonal antibodies against platelet membrane glycoproteins ( gp ) and the von willebrand factor ( vwf ) , it is shown that thrombin-induced binding to gp iib/iiia involves a different site on vwf from ristocetin-induced binding to gp ib .
C0032195
platelet membrane
C0016011
gp iib/iiia