. "A protein complex that catalyzes the reaction 3-methyl-2-oxobutanoate + lipoamide = S-(2-methylpropanoyl)-dihydrolipoamide + carbon dioxide (CO2). This requires thiamine diphosphate; the enzyme also acts on (S)-3-methyl-2-oxopentanoate and 4-methyl-2-oxo-pentanoate." . . . . "3-methyl-2-oxobutanoate dehydrogenase (lipoamide) complex" . "BCADH" . "branched-chain alpha-ketoacid dehydrogenase complex" . . . .