Snaclec that binds to von Willebrand factor (VWF) and induces its interaction with GPIbalpha (GP1BA), resulting in platelet aggregation. In contrary to bitiscetin, it does not bind to the A1 domain. Instead, it interacts with the collagen-binding A3 domain of vWF. Also interferes with the binding of vWF to collagen. Dimer. Expressed by the venom gland. Belongs to the snaclec family.