Inhibits ADP-induced human platelet aggregation. Antagonist of alpha-IIb/beta-3 (ITGA2B/ITGB3) (By similarity). Also avidly binds to the laminin-binding beta-1 integrins (alpha-3/beta-1 (ITGA3/ITGB1), alpha-6/beta-1 (ITGA6/ITGB1), and alpha-7/beta-1 (ITGA7/ITGB1)) in an RGD-independent manner. Heterodimer with subunit beta; disulfide-linked. Expressed by the venom gland. Heterodimer. Has no interaction with the collagen-binding alpha-1/beta-1 (ITGA1/ITGB1) and alpha-2/beta-1 (ITGA2/ITGB1) integrins. Belongs to the disintegrin family. Dimeric disintegrin subfamily.