has role isobutyric acid propionate isobutyrate Isobutyrat 2-methylpropanoate iPrCO2 anion i-butyrate isobutanoate 2-methylpropanoate A branched, short-chain, saturated fatty acid anion; the conjugate base of isobutyric acid, formed by deprotonation of the carboxylic acid group. 2-methylpropionate CHEBI:11627 2-methylpropanoic acid, ion(1-) MetaCyc:ISOBUTYRATE methylpropanoate CHEBI:48944 isobutyric acid anion CHEBI:25334 branched-chain saturated fatty acid anion plant metabolite human metabolite fatty acid anion 4:0