This lethal (towards mice) toxin induces hemolytic, cytolytic and hypotensive activities. Inhibits calcium channels and may activate ATP-sensitive potassium channels in frog atrial heart muscle. In guinea-pig ventricular myocytes, it modulates calcium channel activity through the beta-adrenoceptor-cAMP-PKA pathway (ADRB). Tetramer composed of 2 alpha and 2 beta subunits. However, no signal peptide has been found. This protein may follow a novel secretion pathway. Expressed by the venom gland. Glycosylated. Belongs to the SNTX/VTX toxin family. Extended N-terminus.