(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(+)