- Caseinolytic Peptidase P (CLPP)
- Collagen Like Tail Subunit Of Asymmetric Acetylcholinesterase (COLQ)
- Constitutive Photomorphogenesis Protein 1 (COP1)
- Cytochrome P450 2J2 (CYP2J2)
- Cytochrome P450 2R1 (CYP2R1)
- Cytochrome P450 2S1 (CYP2S1)
- Cytochrome P450 2U1 (CYP2U1)
- Cytochrome P450 4A11 (CYP4A11)
- Cytochrome P450 4F2 (CYP4F2)
- Cytochrome P450 4F3 (CYP4F3)
- Cytochrome P450 4F8 (CYP4F8)
- Cytochrome P450 4V2 (CYP4V2)
- Dihydroxyacetone Kinase 2 (DAK)
- Decapping Enzyme 1B (DCP1B)
- Decapping Enzyme 1A (DCP1A)