Binding of echicetin to GPIbalpha (GP1BA) receptor on platelets alone results in inhibition of platelet aggregation, while binding to both GP1BA receptor and IgMk promotes platelet aggregation and signal transduction. Heterodimer of subunits alpha and beta; disulfide-linked. Expressed by the venom gland. Belongs to the snaclec family. The name echicetin has been given to 2 different proteins, this one from E.carinatus and another one for which the subspecies has been specified (E.carinatus sochureki). Most experiments have been done on E.carinatus sochureki. Truncated N-terminus.