- Iduronidase Alpha L (IDUa)
- Iduronate-2-Sulfatase (IDS)
- Isopentenyl Diphosphate Delta Isomerase 1 (IDI1)
- Isocitrate Dehydrogenase 3 Gamma (IDH3g)
- Isocitrate Dehydrogenase 3 Beta (IDH3b)
- Isocitrate Dehydrogenase 3 Alpha (IDH3a)
- Isocitrate Dehydrogenase 2, mitochondrial (IDH2)
- Isocitrate Dehydrogenase 1, Soluble (IDH1)
- Immature Colon Carcinoma Transcript 1 (ICT1)
- Ichthyin (ICHYN)
- Hydrocephalus Inducing Protein (HYDIN)
- Hydrogen Voltage Gated Channel Protein 1 (HVCN1)
- Zinc Ribbon Domain Containing Protein 1 (ZNRD1)
- Zinc Fingers And Homeoboxes Protein 3 (ZHX3)
- Zinc Fingers And Homeoboxes Protein 2 (ZHX2)
