Cell penetrating peptide (CPP) that increases intracellular calcium release through the activation of nuclear inositol 1,4,5-trisphosphate receptors (ITPR) of cardiomyocytes, thereby causing an increase in the contraction frequency of these cells. In vivo, this toxin is not lethal to mice, hovewer anti-CPP serum reduces venom lethality, suggesting that this toxin is lethal when it acts in synergy with other venom components