Tags: Enzyme.
Diacetyl reductase ((S)-acetoin forming) (EC 1.1.1.304 (S)-acetoin dehydrogenase) is an enzyme with system name (S)-acetoin:NAD+ oxidoreductase. This enzyme catalyses the following chemical reaction (S)-acetoin + NAD+ diacetyl + NADH + H+The reaction is catalysed in the reverse direction. This activity is usually associated with butanediol dehydrogenase activity (EC 1.1.1.4 or EC 1.1.1.76). While the butanediol dehydrogenase activity is reversible diacetyl reductase activity is irreversible.