Alters a variety of ion channel activities, including voltage-gated potassium channels (Kv) (PubMed:8071987), voltage-gated calcium channels (L-, N-, and P-type) (Cav) (PubMed:8817251) and ryanodine receptors (RyR) (PubMed:7647234). Is toxic to mice (causes lethargy, partial paralysis of rear limbs and lowering of body temperature). Expressed by the venom gland. IC(50)=0.52 uM on IA-type current, and 0.86 uM on delayed rectifier current. Belongs to the CRISP family.