(2R)-2,3-dihydroxy-3-methylbutanoate + NAD(+) => (2S)-2-acetolactate + NADH + H(+)
(2r)-2,3-dihydroxy-3-methylbutanoate + nad(+) => (2s)-2-acetolactate + nadh + h(+)
(2R)-2,3-dihydroxy-3-methylbutanoate + NAD(+) => (2S)-2-acetolactate + NADH + H(+)
(2r)-2,3-dihydroxy-3-methylbutanoate + nad(+) => (2s)-2-acetolactate + nadh + h(+)