Sinonimi
Leu-enkephalin, Met Enkephalin, Met-enkephalin, Met-enkephalin-Arg-Gly-Leu, Met-enkephalin-Arg-Phe, Methionine enkephalin, OGF, Opioid growth factor, PENK, PENK(114-133), PENK(143-183), PENK(237-258), PENK_HUMAN, Proenkephalin, Proenkephalin A, Proenkephalin-A, Synenkephalin