(2R)-2,3-dihydroxy-3-methylbutanoate + NADP(+) => (2S)-2-acetolactate + NADPH + H(+)
(2r)-2,3-dihydroxy-3-methylbutanoate + nadp(+) => (2s)-2-acetolactate + nadph + h(+)
(2R)-2,3-dihydroxy-3-methylbutanoate + NADP(+) => (2S)-2-acetolactate + NADPH + H(+)
(2r)-2,3-dihydroxy-3-methylbutanoate + nadp(+) => (2s)-2-acetolactate + nadph + h(+)