Reaction catalyzed by alcohol dehydrogenase (NADP+) (1.1.1.2), (R,R)-butanediol dehydrogenase (1.1.1.4)
+
NADP+
=
+
NADPH
+
2-butanone
+
NADP+
=
2-butanol
+
NADPH
+
H+
