1.3.1.31	butanoate + NAD+ = but-2-enoate + NADH + H+	-	
1.3.1.31	butanoate + NAD+ = but-2-enoate + NADH + H+	bi bi ping pong mechanism	
1.3.1.31	butanoate + NAD+ = but-2-enoate + NADH + H+	ping-pong mechanism in aqueous solution	
1.3.1.31	butanoate + NAD+ = but-2-enoate + NADH + H+	enzyme kinetics in reversed micelles