Insect active toxin causing rapid but reversible paralysis in crickets. No activity shown in mammals. Does not show effect on mammalian voltage-gated calcium channels (By similarity). Expressed by the venom gland. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. Belongs to the neurotoxin 01 (U2-agtx) family.