Snaclec that induces platelet aggregation without any cofactor in a dose-dependent manner. Its platelet aggregation effect is blocked by echicetin, suggesting it is a GPIb-binding protein which binds to the same or a closely related GPIb site on platelets as echicetin. Homodimer (non-covalently linked) of heterodimer of alpha and beta subunits (disulfide-linked). Expressed by the venom gland. Belongs to the snaclec family.