Snake venom lectin that activates platelets by binding to the platelet collagen receptor glycoprotein VI (GP6) (PubMed:9153205). The indirect activation of integrin alpha-IIb/beta-3 (ITGA2B/ITGB3) also induced by the toxin is upstream the cytoskeletal translocation of GPIb, FcRgamma (FCER1G) and 14-3-3zeta (YWHAZ)(PubMed:16102113). Tetramer of heterodimers of alpha and beta subunits (alphabeta)(4); disulfide-linked. Expressed by the venom gland. Does not act by binding to GPIb. Belongs to the snaclec family.