Cytochrophin-4 is an opioid peptide.[1]

References

  1. ^ Liebmann, C; Schrader, U; Brantl, V (1989). "Opioid receptor affinities of the blood-derived tetrapeptides hemorphin and cytochrophin". European Journal of Pharmacology. 166 (3): 523–6. doi:10.1016/0014-2999(89)90368-3. PMID 2553436.