- Heparan Sulfate-6-O-Sulfotransferase 3 (HS6ST3)
- Heparan Sulfate-6-O-Sulfotransferase 2 (HS6ST2)
- Heparan Sulfate-6-O-Sulfotransferase 1 (HS6ST1)
- Heparan Sulfate-3-O-Sulfotransferase 1 (HS3ST1)
- Heparan Sulfate-3-O-Sulfotransferase 2 (HS3ST2)
- Heparan Sulfate-2-O-Sulfotransferase 1 (HS2ST1)
- 15-Hydroxyprostaglandin Dehydrogenase (HPGD)
- Histamine-N-Methyltransferase (HNMT)
- Hepatocyte Growth Factor Regulated Tyrosine Kinase Substrate (HGS)
- Hedgehog Acyltransferase Like Protein (HHATL)
- Hedgehog Acyltransferase (HHAT)
- Haloacid Dehalogenase Like Hydrolase Domain Containing Protein 1 (HDHD1)
- Histidine Ammonia Lyase (HAL)
- Hexose-6-Phosphate Dehydrogenase (H6PD)
- Like Glycosyltransferase (LARGE)
