is tautomer of Met-enkephalin zwitterion [Met(5)]-enkephalin zwitterion 573.670 M-ENK zwitterion MENK zwitterion A peptide zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of Met-enkephalin. Major species at pH 7.3. YFGBQHOOROIVKG-FKBYEOEOSA-N metenkefalin zwitterion L-tyrosylglycylglycyl-L-phenylalanyl-L-methionine zwitterion Met-enkephalin 0 L-Tyr-Gly-Gly-L-Phe-L-Met zwitterion CSCC[C@H](NC(=O)[C@H](CC1=CC=CC=C1)NC(=O)CNC(=O)CNC(=O)[C@@H]([NH3+])CC1=CC=C(O)C=C1)C([O-])=O C27H35N5O7S chebi_ontology InChI=1S/C27H35N5O7S/c1-40-12-11-21(27(38)39)32-26(37)22(14-17-5-3-2-4-6-17)31-24(35)16-29-23(34)15-30-25(36)20(28)13-18-7-9-19(33)10-8-18/h2-10,20-22,33H,11-16,28H2,1H3,(H,29,34)(H,30,36)(H,31,35)(H,32,37)(H,38,39)/t20-,21-,22-/m0/s1 [Met(5)]enkephalin zwitterion Tyr-Gly-Gly-Phe-Met zwitterion N-[(2S)-2-azaniumyl-3-(4-hydroxyphenyl)propanoyl]glycylglycyl-N-[(1S)-1-carboxylato-3-(methylsulfanyl)propyl]-L-phenylalaninamide 573.22572 CHEBI:189868 peptide zwitterion Met-enkephalin