Compound as reactive (1)
NAD(P)+ + (
R
)-2,3-dihydroxy-3-methylpentanoate ← NAD(P)H + H
+
+
(
S
)-2-aceto-2-hydroxybutanoate
Compound as product (1)
2-oxobutanoate + pyruvate + H
+
→
(
S
)-2-aceto-2-hydroxybutanoate
+ CO
2
Reversible reaction (2)
(
S
)-2-aceto-2-hydroxybutanoate
↔ (
R
)-3-hydroxy-3-methyl-2-oxopentanoate
(
R
)-2,3-dihydroxy-3-methylpentanoate + NADP
+
↔ NADPH + H
+
+
(
S
)-2-aceto-2-hydroxybutanoate