the observed binding was specific to the interaction between vwf and the gp ib-ix complex since there was no ristocetin-dependent specific binding of vwf if the physicochemically related platelet membrane glycoprotein , gp iib , was substituted for the gp ib-ix complex in a corresponding bead assay .
C0032195
platelet membrane glycoprotein
C0017966
gp ib-ix complex