- R
- RETN
- ROPN1L
- RECK
- RHA
- RHBDF2
- RETNLB
- RICTOR
- REST
- RAMP
- RBP
- RASSF1
- RB1
- Reductase
- RTEL1
- RABV
- Rotavirus toxin
- REG4
- Retrocyclin
- RANKL
- RAR
- RXR
- RASIP
- RACGAP
- RALBP1
- RGS14
- RGS4
- RALB
- RAN
- RRAG
- RSPO1
- RSPO2
- RSPO3
- RABAC1
- RAGE
- ROBO
- RSTK
- RAG1
- Replication protein
- RPA
- RAG2
- RANBP10
- RBP1
- RBP4
- RBP56
- RED
- RBM39
- RACK1
- RELA
- RELB
- RUNX1
- RUNX2
- RUNX3
- RAMP2
- RAMP3
- RAC1
- Ras
- RHEB
- RPE65
- RNF
- RARS
- RNLS
- RNR
- RNMT
- RIG-I
- RLN
- Retroviral protease
- RARA
- RARB
- RARG
- RXRA
- RXRB
- RXRG
- RASA1
- RACGAP1
- RHO
- RGMA
- Relaxin
- ROBO1
- ROBO2
- ROBO4
- RAD51
- RAD52
- REV1
- RPE1
- RLBP1
- RPE
- RPGR
- RS1
- RP1
- RTN4
- RSF1
- RYR
- RAC
- RAB38
- RAB7A
- RNF39
- RNF31
- RDH
- RDH1
- RDH12