is conjugate base of methionine methioninate chebi_ontology 148.04377 2-amino-4-(methylsulfanyl)butanoate CSCCC(N)C([O-])=O methioninate Reaxys:3937270 C5H10NO2S A sulfur-containing amino-acid anion that is the conjugate base of methionine, arising from deprotonation of the carboxy group. FFEARJCKVFRZRR-UHFFFAOYSA-M met(-) methionine anion InChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)/p-1 148.20444 CHEBI:32644 Beilstein:3937270 Gmelin:326565 -1 alpha-amino-acid anion sulfur-containing amino-acid anion