1.1.1.35	3-hydroxyacyl-CoA dehydrogenase	(R)- and (S)-3-hydroxybutanoate biosynthesis (engineered)	
1.1.1.36	acetoacetyl-CoA reductase	(R)- and (S)-3-hydroxybutanoate biosynthesis (engineered)	
2.3.1.9	acetyl-CoA C-acetyltransferase	(R)- and (S)-3-hydroxybutanoate biosynthesis (engineered)	
2.3.1.16	acetyl-CoA C-acyltransferase	(R)- and (S)-3-hydroxybutanoate biosynthesis (engineered)