- Regulatory Factor X Associated Protein (RFXAP)
- Regulatory Factor X 7 (RFX7)
- Regulatory Factor X 6 (RFX6)
- Regulatory Factor X 5 (RFX5)
- Regulatory Factor X 4 (RFX4)
- Regulatory Factor X 3 (RFX3)
- Regulatory Factor X 2 (RFX2)
- Regulatory Factor X 1 (RFX1)
- Regulatory Factor X Associated Ankyrin Containing Protein (RFXANK)
- Riboflavin Kinase (RFK)
- Retinol Saturase (RETSAT)
- RE1 Silencing Transcription Factor (REST)
- Receptor Accessory Protein 1 (REEP1)
- Retinol Dehydrogenase 12 (RDH12)
- Retinol Dehydrogenase 11 (RDH11)
