Causes scratching in mice. Expressed by the venom duct. The cysteine framework is III (CC-C-C-CC). Classified in the M-2 branch, since 2 residues stand between the fourth and the fifth cysteine residues. The hydroxylation at Pro-62 is observed in PubMed:15924437, PubMed:19380747 and PubMed:22709442, and the non-hydroxylation is described in PubMed:22709442. Belongs to the conotoxin M superfamily.