Inhibits fibrinogen interaction with platelets. Acts by binding to alpha-IIb/beta-3 (ITGA2B/ITGB3) on the platelet surface and inhibits aggregation induced by ADP, thrombin, platelet-activating factor and collagen. Monomer. Expressed by the venom gland. The disintegrins belong to the medium disintegrin subfamily. Belongs to the venom metalloproteinase (M12B) family. P-II subfamily. P-IIa sub-subfamily.