- U
- UBE2D2
- UBE2L3
- USP34
- Usher syndrome
- USP1-UAF1
- UCHL1
- UCHL5
- USP
- USP1
- USP2
- USP4
- USP5
- USP7
- USP8
- USP9X
- USP10
- USP11
- USP13
- USP14
- USP15
- USP19
- USP20
- USP30
- USP33
- UBB
- UBC
- USP21
- UBD
- UBL
- ULBP1
- UMOD
- ULBP2
- USH1C
- USH1G
- UNC45A
- UNC13A
- UL97
- ULK1
- ULK2
- ULK3
- UCP
- UCP1
- UCP2
- URAT1
- UV-DDB
- UL54
- UPA
- UCN
- UCN2
- UTS2
- UPAR
- UBA1
- UBA5
- UBE2
- UBE2D3
- UBE2E2
- UBE2H
- UBE2K
- UBE2R1
- UBA
- Uricase
- UBE3
- UBE3A
- Urease
- UNG
- Unspecified ligand gene
- Unspecified receptor
- UCK2
- UMPS
- UROS
- UTRN
- UDP-Galp
- UGT1A1
- UPP
- UQCRB
- UBP1
- UBE2M
- UPPS
- UPF1
- Urea transporter
- USH2A
- Unspecified gene
- US28
- Unspecified enzyme
- UPF