Elicits hyperactivity when injected intracranially into mice and produces paralysis when injected into the pedal muscle of freshwater snails, Pomacea paludosa, but it has no apparent effect after intramuscular injection into the limpet Patella opea or the freshwater fish Lebistes reticulatus. Expressed by the venom duct. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. The cysteine framework is VI/VII (C-C-CC-C-C).