Reaction catalyzed by ketol-acid reductoisomerase (NAD+) (1.1.1.382)
+
NAD+
=
+
NADH
+
(2R)-2,3-dihydroxy-3-methylbutanoate
+
NAD+
=
(2S)-2-hydroxy-2-methyl-3-oxobutanoate
+
NADH
+
H+
