| Unconventional myosin-Ib (Fragment) | MYO1B | H7C2Y7 | 1 |
| Unconventional myosin-Ib (Fragment) | MYO1B | E7EQD9 | 1 |
| Unconventional myosin-Ic (Fragment) | MYO1C | I3L168 | 1 |
| Unconventional myosin-Ic (Fragment) | MYO1C | I3L4D4 | 1 |
| Unconventional myosin-Id | MYO1D | J3QRN6 | 1 |
| Unconventional myosin-Id | MYO1D | J3KRL0 | 1 |
| Unconventional myosin-IXa (Fragment) | MYO9A | H3BMS3 | 1 |
| Unconventional myosin-IXa (Fragment) | MYO9A | H3BSU8 | 1 |
| Unconventional myosin-IXb (Fragment) | MYO9B | M0R300 | 1 |
| Unconventional myosin-Va | MYO5A | F8WE88 | 1 |
| Unconventional myosin-Va | MYO5A | F8W6H6 | 1 |
| Unconventional myosin-VI (Fragment) | MYO6 | Q5JVM0 | 1 |
| Unconventional myosin-XV (Fragment) | MYO15A | G3V4G3 | 1 |
| Unconventional myosin-XVIIIa (Molecule associated with JAK3 N-terminus) (MAJN) (Myosin containing a PDZ domain) (Surfactant protein receptor SP-R210) (SP-R210) | MYO18A CD245 KIAA0216 MYSPDZ | Q5QD01 | 1 |
| UPF0160 protein MYG1, mitochondrial | C12orf10 | F8VQQ3 | 1 |
| UPF0184 protein C9orf16 | C9orf16 EST00098 | Q9BUW7 | 1 |
| UPF0193 protein EVG1 | C22orf23 | Q9BZE7 | 1 |
| UPF0317 protein C14orf159, mitochondrial (Fragment) | C14orf159 | H0YB09 | 1 |
| UPF0449 protein C19orf25 | C19orf25 | E7EP72 | 1 |
| UPF0449 protein C19orf25 | C19orf25 | K7EQW1 | 1 |
| UPF0469 protein KIAA0907 | KIAA0907 BLOM7 | Q7Z7F0 | 1 |
| UPF0505 protein C16orf62 | C16orf62 | H3BVG8 | 1 |
| UPF0505 protein C16orf62 | C16orf62 | F6S1J4 | 1 |
| UPF0536 protein C12orf66 | C12orf66 | Q96MD2 | 1 |
| UPF0547 protein C16orf87 | C16orf87 | Q6PH81 | 1 |
| UPF0568 protein C14orf166 (Fragment) | C14orf166 | H0YJB9 | 1 |
| UPF0577 protein KIAA1324-like (Estrogen-induced gene 121-like protein) (hEIG121L) | KIAA1324L EIG121L | A8MWY0 | 1 |
| UPF0583 protein C15orf59 | C15orf59 | Q2T9L4 | 1 |
| UPF0606 protein KIAA1549L | KIAA1549L C11orf41 C11orf69 | Q6ZVL6 | 1 |
| UPF0686 protein C11orf1 | C11orf1 | E9PMC1 | 1 |
| UPF0688 protein C1orf174 | C1orf174 | Q8IYL3 | 1 |
| UPF0705 protein C11orf49 | C11orf49 | E9PAX7 | 1 |
| UPF0722 protein C11orf88 | C11orf88 | Q6PI97 | 1 |
| UPF0729 protein C18orf32 (Putative NF-kappa-B-activating protein 200) | C18orf32 | Q8TCD1 | 1 |
| UPF0764 protein C16orf89 | C16orf89 | A0A0A0MT71 | 1 |
| Upstream stimulatory factor 1 (Fragment) | USF1 | H0YD59 | 1 |
| Upstream stimulatory factor 2 (Fragment) | USF2 | M0QY46 | 1 |
| Uracil phosphoribosyltransferase homolog | UPRT | Q96BW1 | 1 |
| Uracil-DNA glycosylase (UDG) (EC 3.2.2.27) | UNG DGU UNG1 UNG15 | P13051 | 1 |
| Urea transporter 2 (Solute carrier family 14 member 2) (Urea transporter, kidney) | SLC14A2 HUT2 UT2 | Q15849 | 1 |
| Uridine 5'-monophosphate synthase | UMPS | E9PFD2 | 1 |
| Uridine 5'-monophosphate synthase (UMP synthase) [Includes: Orotate phosphoribosyltransferase (OPRT) (OPRTase) (EC 2.4.2.10); Orotidine 5'-phosphate decarboxylase (ODC) (EC 4.1.1.23) (OMPdecase)] | UMPS OK/SW-cl.21 | B5LY68 | 1 |
| Uridine monophosphate synthetase isoform E | UMPS | B5LY67 | 1 |
| Urocortin-3 (Stresscopin) (Urocortin III) (Ucn III) | UCN3 SPC | Q969E3 | 1 |
| Urokinase plasminogen activator surface receptor (Fragment) | PLAUR | M0R0Y4 | 1 |
| Urokinase plasminogen activator surface receptor (Fragment) | PLAUR | M0R383 | 1 |
| Urokinase-type plasminogen activator | PLAU | E7ET40 | 1 |
| Uroporphyrinogen decarboxylase (Fragment) | UROD | Q71UD5 | 1 |
| Uroporphyrinogen decarboxylase (Fragment) | UROD | H0Y5R6 | 1 |
| Uroporphyrinogen decarboxylase (Fragment) | UROD | Q5T446 | 1 |
| Uroporphyrinogen-III synthase | UROS | Q5T3L7 | 1 |
| Urotensin-2 | UTS2 | Q5H8X8 | 1 |
| Urotensin-2B (Urotensin II-related peptide) (Urotensin IIB) (U-IIB) (UIIB) (Urotensin-2 domain-containing protein) | UTS2B URP UTS2D | Q765I0 | 1 |
| Usher syndrome type-1C protein-binding protein 1 | USHBP1 | G8JLM4 | 1 |
| UTP--glucose-1-phosphate uridylyltransferase (Fragment) | UGP2 | C9JQU9 | 1 |
| Utrophin (Fragment) | UTRN | Q5JT45 | 1 |
| UV excision repair protein RAD23 homolog A | RAD23A | K7ENJ0 | 1 |
| UV excision repair protein RAD23 homolog B (Fragment) | RAD23B | H0Y579 | 1 |
| UV excision repair protein RAD23 homolog B (Fragment) | RAD23B | Q5W0S4 | 1 |
| V-set and immunoglobulin domain-containing protein 2 (Cortical thymocyte-like protein) (CT-like protein) | VSIG2 CTH CTXL UNQ2770/PRO7154 | Q96IQ7 | 1 |
| V-set and immunoglobulin domain-containing protein 4 (Fragment) | VSIG4 | H7C062 | 1 |
| V-set domain-containing T-cell activation inhibitor 1 | VTCN1 | Q5T2L0 | 1 |
| V-type proton ATPase catalytic subunit A (Fragment) | ATP6V1A | C9JA17 | 1 |
| V-type proton ATPase catalytic subunit A (Fragment) | ATP6V1A | C9JVW8 | 1 |
| V-type proton ATPase catalytic subunit A (V-ATPase subunit A) (EC 3.6.3.14) (V-ATPase 69 kDa subunit) (Vacuolar ATPase isoform VA68) (Vacuolar proton pump subunit alpha) | ATP6V1A ATP6A1 ATP6V1A1 VPP2 | B7Z1R5 | 1 |
| V-type proton ATPase catalytic subunit A (V-ATPase subunit A) (EC 3.6.3.14) (V-ATPase 69 kDa subunit) (Vacuolar ATPase isoform VA68) (Vacuolar proton pump subunit alpha) | ATP6V1A ATP6A1 ATP6V1A1 VPP2 | B2RBR8 | 1 |
| V-type proton ATPase subunit a (Fragment) | ATP6V0A1 | K7EM24 | 1 |
| V-type proton ATPase subunit a (Fragment) | ATP6V0A1 | K7EPG4 | 1 |
| V-type proton ATPase subunit a (Fragment) | ATP6V0A2 | F5H847 | 1 |
| V-type proton ATPase subunit a (Fragment) | ATP6V0A1 | K7ELZ6 | 1 |
| V-type proton ATPase subunit a (Fragment) | ATP6V0A1 | K7EN36 | 1 |
| V-type proton ATPase subunit B, brain isoform | ATP6V1B2 | E5RGH6 | 1 |
| V-type proton ATPase subunit B, brain isoform (V-ATPase subunit B 2) (Endomembrane proton pump 58 kDa subunit) (HO57) (Vacuolar proton pump subunit B 2) | ATP6V1B2 ATP6B2 VPP3 | Q96IR0 | 1 |
| V-type proton ATPase subunit B, kidney isoform | ATP6V1B1 | C9J5E3 | 1 |
| V-type proton ATPase subunit B, kidney isoform (Fragment) | ATP6V1B1 | C9JNS9 | 1 |
| V-type proton ATPase subunit C | 0 | A8KA87 | 1 |
| V-type proton ATPase subunit C | ATP6V1C1 | E7EV59 | 1 |
| V-type proton ATPase subunit D | ATP6V1D | G3V2V6 | 1 |
| V-type proton ATPase subunit D (Fragment) | ATP6V1D | H0YJH8 | 1 |
| V-type proton ATPase subunit d 1 | ATP6V0D1 | H3BQB4 | 1 |
| V-type proton ATPase subunit d 1 (Fragment) | ATP6V0D1 | H3BTB4 | 1 |
| V-type proton ATPase subunit E 1 (V-ATPase subunit E 1) (V-ATPase 31 kDa subunit) (p31) (Vacuolar proton pump subunit E 1) | ATP6V1E1 ATP6E ATP6E2 | A8MUN4 | 1 |
| V-type proton ATPase subunit E 1 (V-ATPase subunit E 1) (V-ATPase 31 kDa subunit) (p31) (Vacuolar proton pump subunit E 1) | ATP6V1E1 ATP6E ATP6E2 | A8MUE4 | 1 |
| V-type proton ATPase subunit G 2 (V-ATPase subunit G 2) (V-ATPase 13 kDa subunit 2) (Vacuolar proton pump subunit G 2) | ATP6V1G2 ATP6G ATP6G2 NG38 | O95670 | 1 |
| V1-11 protein (Fragment) | V1-11 | Q5NV67 | 1 |
| V1-19 protein (Fragment) | V1-19 | A2MYD2 | 1 |
| V1-7 protein (Fragment) | V1-7 | Q5NV89 | 1 |
| V2-14 protein (Fragment) | V2-14 | Q5NV74 | 1 |
| V2-19 protein (Fragment) | V2-19 | Q5NV91 | 1 |
| V2-7 protein (Fragment) | V2-7 | A2MYD4 | 1 |
| V3-4 protein (Fragment) | V3-4 | Q5NV62 | 1 |
| V5-2 protein (Fragment) | V5-2 | A2MYC8 | 1 |
| V1 protein (Fragment) | V1 | A0N5T0 | 1 |
| Vacuolar fusion protein MON1 homolog B | MON1B | H3BQ73 | 1 |
| Vacuolar protein sorting 11 (Yeast homolog) variant (Fragment) | 0 | Q53FX3 | 1 |
| Vacuolar protein sorting 11 (Yeast), isoform CRA_a (Vacuolar protein sorting-associated protein 11 homolog) | VPS11 hCG_39399 | A0A087WXL6 | 1 |
| Vacuolar protein sorting-associated protein 11 homolog (cDNA FLJ54956, highly similar to Vacuolar protein sorting 11) | VPS11 | B7Z879 | 1 |
| Vacuolar protein sorting-associated protein 13D (Fragment) | VPS13D | H3BLS7 | 1 |
| Vacuolar protein sorting-associated protein 18 homolog | VPS18 | H0YLM6 | 1 |
| Vacuolar protein sorting-associated protein 33B | VPS33B | F5H008 | 1 |