EP-ENK; Enkephalin A; P ENK; Preproencephalin A; Proenkephalin A; Proenkephalin; Synenkephalin; Proenkephalin; Opioid growth factor; OGF; PENK protein; ProenkephalinA; PENK_HUMAN; Met-enkephalin-Arg-Gly-Leu; Met-enkephalin-Arg-Phe; Synenkephalin; PENK(114-133); PENK(143-183); PENK(237-258).
