May act as a neurotoxin. Expressed by the venom duct. The D-phenylalanine is essential to the structural conformation. Since conomarphin is a cysteine-free peptide, hydroxyproline plays a critical role in maintaining a restricted conformation of the peptide. The mature peptide does not contain cysteine residues. The amino acid sequence of conomarphin is identical to that of C.imperialis Im-conomarphin (AC P0CH39). Their nucleotide sequences are not identical. Belongs to the conotoxin M superfamily.