| EC:1.1.1.30 3-hydroxybutyrate dehydrogenase. | TG | PF | CP | HS |
| EC:2.3.1.9 Acetyl-CoA C-acetyltransferase. | TG | PF | CP | HS |
| EC:2.3.3.10 Hydroxymethylglutaryl-CoA synthase. | TG | PF | CP | HS |
| EC:2.8.3.5 3-oxoacid CoA-transferase. | TG | PF | CP | HS |
| EC:4.1.1.4 Acetoacetate decarboxylase. | TG | PF | CP | HS |
| EC:4.1.3.4 Hydroxymethylglutaryl-CoA lyase. | TG | PF | CP | HS |