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Ketol-Acid Reductoisomerase
Acetohydroxy Acid Isomeroreductase; Alpha-Acetohydroxyacid Isomeroreductase; Dihydroxyisovalerate Dehydrogenase (Isomerizing); Hydroxyacid Reductoisomerase; Isomeroreductase; Acid Isomeroreductase, Acetohydroxy; Alpha Acetohydroxyacid Isomeroreductase
An enzyme that catalyzes the oxidation of (R)-2,3-dihydroxy-3-methylbutanoate to (S)-2-hydroxy-2-methyl-3-oxobutanoate in the presence of NADP. It is involved in the biosynthesis of VALINE; LEUCINE; ISOLEUCINE; pentothenate and COENZYME A. This enzyme was formerly classified as EC 1.1.1.89.