Snaclec that binds to von Willebrand factor (VWF) and induces its interaction with GPIbalpha (GP1BA) (via the vWF A1 domain), resulting in platelet aggregation. Heterodimer of subunits alpha and beta; disulfide-linked. Botrocetin and vWF form a soluble complex. Expressed by the venom gland. Is a standard reagent for testing vWF/platelet interactions and detection of the defects in von Willebrand disease and in GPIb-related disorders such as Bernard-Soulier syndrome. There are two distinct forms of the vWF-dependent platelet coagglutinin. The dimeric form (snaclec) is 34-fold more active than the metalloprotease botrocetin in promoting vWF binding to platelets (PubMed:1993206). Belongs to the snaclec family.