Reaction catalyzed by malonate-semialdehyde dehydrogenase (acetylating) (1.2.1.18), methylmalonate-semialdehyde dehydrogenase (CoA-acylating) (1.2.1.27)
+
CoA
+
NAD+
=
+
+
NADH
2-methyl-3-oxopropanoate
+
CoA
+
NAD+
=
propanoyl-CoA
+
CO2
+
NADH
