- UBXD2
- UBXN1
- UBXN10
- UBXN11
- UBXN2A
- UBXN2B
- UBXN6
- UBXN7
- UBXN8
- UCHL1
- UCHL3
- UCHL4
- UCHL5
- UCK1
- UCK1-B
- UCK2
- UCKL1
- UCMA
- UCN3
- UCP1
- UCP2
- UCP3
- UEVLD
- UFC1
- UFD1L
- UFL1
- UFM1
- UFSP1
- UFSP2
- UGCG
- UGCGL2
- UGDH
- UGGT1
- UGP2
- Ugt1
- UGT1A1
- UGT1A10
- UGT1A3
- UGT1A4
- UGT1A5
- UGT1A6
- UGT1A7
- UGT1A8
- UGT1A9
- UGT2A1
- UGT2A2
- UGT2A3
- Ugt2b
- UGT2B10
- UGT2B11
- UGT2B15
- UGT2B17
- UGT2B28
- UGT2B4
- UGT2B7
- UGT3A1
- UGT3A2
- UGT8
- UHMK1
- UHRF1
- UHRF1BP1
- UHRF1BP1L
- UHRF2
- UIMC1
- ULBP1
- ULBP2
- ULBP3
- ULK1
- ULK2
- ULK3
- ULK4
- UMODL1
- UMPS
- UNC119
- UNC119B
- UNC13A/Munc13-1
- UNC13B
- UNC13C
- UNC13D
- UNC45A
- UNC45B
- UNC50
- UNC5A
- UNC5B
- Unc5c
- UNC5CL
- UNC5D
- UNC80
- UNC93A
- UNC93B1
- UNCX
- UNG
- UNK
- UNKL
- UPB1
- UPF3A
- UPF3B
- UPK1A
- UPK3BL
- UPP1