- Dehydrogenase/Reductase SDR Family, Member 7 (DHRS7)
- Dihydrofolate Reductase (DHFR)
- Dihydroorotate Dehydrogenase (DHODH)
- Diacylglycerol-O-Acyltransferase Homolog 2 (DGAT2)
- Diacylglycerol-O-Acyltransferase Homolog 1 (DGAT1)
- 2,4-Dienoyl Coenzyme A Reductase 1 (DECR1)
- Dolichyl Diphosphooligosaccharide Protein Glycosyltransferase (DDOST)
- D-Aspartate Oxidase (DDO)
- Dicarbonyl/L-Xylulose Reductase (DCXR)
- Decapping Enzyme Scavenger (DCPS)
- dCMP Deaminase (DCTD)
- Debranching Enzyme Homolog 1 (DBR1)
- Dihydrolipoamide Branched Chain Transacylase E2 (DBT)
- D-Amino Acid Oxidase (DAO)
- D2-Hydroxyglutarate Dehydrogenase (D2HGDH)