ID 5.4.99.3 DE 2-acetolactate mutase. AN acetohydroxy acid isomerase. CA 2-acetolactate = 3-hydroxy-3-methyl-2-oxobutanoate. CC -!- Also converts 2-aceto-2-hydroxybutanoate to 3-hydroxy-3-methyl-2- CC oxopentanoate. //