Is both paralytic and lethal, when injected into lepidopteran larvae. Is a slower acting toxin, being lethal at 24 hours, but not paralytic at 1 hour post-injection. Expressed by the venom gland. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. LD(50) is 1.40 mg/kg by subcutaneous injection. Belongs to the neurotoxin 14 (magi-1) family. To aptotoxin III.