Analgesic toxin that is blocked by atropine and naloxone, suggesting the involvement of cholinergic and opiodergic mechanisms in its antinociceptive effect (PubMed:18765245). Shows cytolytic activity by forming pore in lipid membranes (By similarity). Monomer. Expressed by the venom gland. The measured range is 1-?. LD(50) is 2.61 mg/kg by intraperitoneal injection into mice. Is classified as a S-type cytotoxin, since a serine residue stands at position 28 (Ser-29 in standard classification). Belongs to the snake three-finger toxin family. Short-chain subfamily. Type IA cytotoxin sub-subfamily. This fragment is 100% identical to cardiotoxin 5 (AC Q98961) and cardiotoxin A4b (AC P07525) from the same species.