The homodimer-1 (C-62 linked to C-64) causes a reversible hyperactivity (jumping, rapid circling and tail flicking), when intraventricularly injected into the brains of mice. Monomer and homodimer-2 have no activity. Homodimer; disulfide-linked. Found in vitro with synthetic peptides. Expressed by the venom duct. The cysteine framework is C-C. The mature peptide does not contain cysteine residue. Belongs to the conotoxin M superfamily. The name Vt3.1 given by the authors is incorrect, since the first number indicates a cysteine framework III which does not correspond to this cysteine framework.