| Uncharacterized protein | Gm884 | E9Q472 | 1 |
| Uncharacterized protein (Fragment) | Gm20671 C330019G07Rik | F6TVX7 | 1 |
| Uncharacterized protein (Fragment) | Gm28036 Cpne1 | F6YJB6 | 1 |
| Uncharacterized protein (Fragment) | Gm14214 | V9GX35 | 1 |
| Uncharacterized protein (Fragment) | Gm20441 | G3UYJ7 | 1 |
| Uncharacterized protein (Fragment) | Gm42674 | D3YUT9 | 1 |
| Uncharacterized protein (Fragment) | Gm28048 Commd1 | F7BCN0 | 1 |
| Uncharacterized protein C11orf98 homolog | 0 | Q9D937 | 1 |
| Uncharacterized protein C19orf60 homolog | 0 | Q9CYZ6 | 1 |
| Uncharacterized protein C20orf24 homolog | 0 | Q9CQT9 | 1 |
| Uncharacterized protein C2orf72 homolog | 0 | Q9CYS6 | 1 |
| Uncharacterized protein C2orf78 homolog | Gm5592 | Q3V0A6 | 1 |
| Uncharacterized protein C8orf58 homolog | 0 | Q66JV7 | 1 |
| Uncharacterized protein FLJ45252 homolog | 0 | Q6PIU9 | 1 |
| Uncharacterized protein KIAA0754 | Kiaa0754 | Q69ZZ9 | 1 |
| Uncharacterized protein KIAA2013 | Kiaa2013 | Q91X21 | 1 |
| Unconventional myosin-Ib | Myo1b | E9Q580 | 1 |
| Unconventional myosin-IXa (Unconventional myosin-9a) | Myo9a Myr7 | Q8C170 | 1 |
| Unconventional myosin-IXb | Myo9b | E9PWZ6 | 1 |
| Unconventional myosin-VI | Myo6 | E9PVU0 | 1 |
| Unconventional myosin-VI | Myo6 | E9Q174 | 1 |
| Unconventional myosin-VI | Myo6 | V9GX76 | 1 |
| Unconventional myosin-VI | Myo6 | V9GXM4 | 1 |
| Unconventional myosin-XVIIIa | Myo18a | E9Q405 | 1 |
| Unconventional myosin-XVIIIa | Myo18a | E9QA74 | 1 |
| Unconventional myosin-XVIIIa | Myo18a | K3W4L0 | 1 |
| Undifferentiated embryonic cell transcription factor 1 | Utf1 | Q6J1H4 | 1 |
| Up-regulator of cell proliferation (HBV X protein up-regulated gene 4 protein homolog) (HBxAg up-regulated gene 4 protein homolog) | Urgcp Urg4 | Q5NCI0 | 1 |
| UPF0317 protein C14orf159 homolog, mitochondrial | 0 | Q8BH86 | 1 |
| UPF0449 protein C19orf25 homolog | 0 | Q9D7E4 | 1 |
| UPF0488 protein C8orf33 homolog | 0 | Q3U6N9 | 1 |
| UPF0577 protein KIAA1324-like homolog (Estrogen-induced gene 121-like protein) (EIG121L) | 0 | Q3UZV7 | 1 |
| UPF0711 protein C18orf21 homolog | 0 | Q5XFZ0 | 1 |
| UPF2 regulator of nonsense transcripts homolog (Yeast) (UPF2 regulator of nonsense transcripts homolog (yeast)) | Upf2 | A2AT37 | 1 |
| UPF3 regulator of nonsense transcripts homolog B (yeast) (Fragment) | Upf3b | F6Q8N5 | 1 |
| Upstream-binding protein 1 (Nuclear factor 2d9) (NF2d9) | Ubp1 Cp2b Nf2d9 | Q811S7 | 1 |
| URB2 ribosome biogenesis 2 homolog (S. cerevisiae) | Urb2 | E9Q7L1 | 1 |
| Uridine kinase (EC 2.7.1.48) (Uridine-cytidine kinase) | Uck1 | A2AN37 | 1 |
| Uridine-cytidine kinase 1 (UCK 1) (EC 2.7.1.48) (Cytidine monophosphokinase 1) (Uridine monophosphokinase 1) | Uck1 Umpk | P52623 | 1 |
| Urotensin-2 receptor (UR-2-R) (G-protein coupled receptor 14) (Urotensin II receptor) (UR-II-R) | Uts2r Gpr14 | Q8VIH9 | 1 |
| Usherin (Usher syndrome type IIa protein homolog) (Usher syndrome type-2A protein homolog) | Ush2A Gm676 | Q2QI47 | 1 |
| UV excision repair protein RAD23 homolog A (HR23A) (mHR23A) | Rad23a Mhr23a | P54726 | 1 |
| UV radiation resistance associated protein | Uvrag Uvrag1 | Q8C0K8 | 1 |
| UV radiation resistance associated protein | Uvrag Uvrag1 | Q8K245 | 1 |
| Uveal autoantigen with coiled-coil domains and ankyrin repeats (Nuclear membrane-binding protein) (Nucling) | Uaca Kiaa1561 | Q8CGB3 | 1 |
| V-set and immunoglobulin domain-containing protein 10 | Vsig10 | D3YX43 | 1 |
| V-set and immunoglobulin domain-containing protein 10 | Vsig10 | E9PVW4 | 1 |
| V-type proton ATPase subunit a | Atp6v0a1 | K3W4T3 | 1 |
| V-type proton ATPase subunit a (Fragment) | Tcirg1 | F6XRE6 | 1 |
| V-type proton ATPase subunit F (Fragment) | Atp6v1f | F7B2B4 | 1 |
| Vacuolar protein sorting-associated protein 29 (Vesicle protein sorting 29) | Vps29 | D3Z645 | 1 |
| Vacuolar protein sorting-associated protein 33B | Vps33b | P59016 | 1 |
| Vacuolar protein sorting-associated protein 52 homolog (Fragment) | Vps52 | G3UY33 | 1 |
| Vacuolar protein sorting-associated protein 53 homolog | Vps53 | E9PYD3 | 1 |
| Vacuolar protein sorting-associated protein 8 homolog | Vps8 Kiaa0804 | Q0P5W1 | 1 |
| Vacuolar protein sorting-associated protein 8 homolog | Vps8 | D3YUP0 | 1 |
| Vacuolar protein sorting-associated protein 8 homolog | Vps8 | F8WI64 | 1 |
| Vacuolar protein sorting-associated protein 8 homolog | Vps8 | D3Z5P1 | 1 |
| Vacuolar protein sorting-associated protein VTA1 homolog (Fragment) | Vta1 | F6W5Q8 | 1 |
| Vacuolar-sorting protein SNF8 | Snf8 | A2A6M1 | 1 |
| Vacuole membrane protein 1 (Fragment) | Vmp1 | Q5SXR2 | 1 |
| Vacuole membrane protein 1 (NF-E2-inducible protein 2) (Protein ni-2) (Transmembrane protein 49) | Vmp1 Tmem49 | Q99KU0 | 1 |
| Vang-like protein 1 (Fragment) | Vangl1 | F7BWJ0 | 1 |
| Vascular non-inflammatory molecule 3 (Vanin-3) (EC 3.5.1.92) | Vnn3 | Q9QZ25 | 1 |
| Very low-density lipoprotein receptor | Vldlr | F8WGI9 | 1 |
| Very low-density lipoprotein receptor (Fragment) | Vldlr | F6RKS4 | 1 |
| Very low-density lipoprotein receptor (VLDL receptor) (VLDL-R) | Vldlr | P98156 | 1 |
| Very low-density lipoprotein receptor (Vldlr protein) | Vldlr | Q91YY0 | 1 |
| Vesicle transport protein | Sft2d3 | E9QJT3 | 1 |
| Vesicle transport protein GOT1B (Golgi transport 1 homolog B) | Golt1b | Q9CR60 | 1 |
| Vesicle transport protein SEC20 | Bnip1 Sec20 Sec20l | Q6QD59 | 1 |
| Vesicle transport protein SEC20 (Fragment) | Bnip1 | F7C279 | 1 |
| Vesicle transport protein SFT2B (SFT2 domain-containing protein 2) | Sft2d2 | Q8VD57 | 1 |
| Vesicle transport protein SFT2C (SFT2 domain-containing protein 3) | Sft2d3 | Q9CSV6 | 1 |
| Vesicle-associated membrane protein 1 (Fragment) | Vamp1 | A0A0N4SUV3 | 1 |
| Vesicular glutamate transporter 3 (VGluT3) (Solute carrier family 17 member 8) | Slc17a8 Vglut3 | Q8BFU8 | 1 |
| VIP peptides | Vip | A0A0R4J003 | 1 |
| VIP36-like protein (Fragment) | Lman2l | F6QN75 | 1 |
| VIP36-like protein (Lectin mannose-binding 2-like) (LMAN2-like protein) | Lman2l Vipl | P59481 | 1 |
| Visinin-like protein 1 (VILIP) (Neural visinin-like protein 1) (NVL-1) (NVP-1) | Vsnl1 Visl1 | P62761 | 1 |
| Vitamin K epoxide reductase complex subunit 1 (EC 1.17.4.4) (Vitamin K1 2,3-epoxide reductase subunit 1) | Vkorc1 | Q9CRC0 | 1 |
| Vitamin K-dependent gamma-carboxylase (EC 4.1.1.90) (Gamma-glutamyl carboxylase) (Peptidyl-glutamate 4-carboxylase) (Vitamin K gamma glutamyl carboxylase) | Ggcx | Q9QYC7 | 1 |
| Vitamin K-dependent protein C (EC 3.4.21.69) (Anticoagulant protein C) (Autoprothrombin IIA) (Blood coagulation factor XIV) [Cleaved into: Vitamin K-dependent protein C light chain; Vitamin K-dependent protein C heavy chain; Activation peptide] | Proc | P33587 | 1 |
| Vk protein (Fragment) | Vk | A0N262 | 1 |
| Voltage-dependent L-type calcium channel subunit alpha-1S (Calcium channel, L type, alpha-1 polypeptide, isoform 3, skeletal muscle) (Voltage-gated calcium channel subunit alpha Cav1.1) | Cacna1s Cach1 Cach1b Cacn1 Cacnl1a3 | Q02789 | 1 |
| Voltage-dependent N-type calcium channel subunit alpha | Cacna1b | A2AIS0 | 1 |
| Voltage-gated potassium channel subunit beta-1 (EC 1.1.1.-) (K(+) channel subunit beta-1) (Kv-beta-1) | Kcnab1 Kvb1 | P63143 | 1 |
| Voltage-gated potassium channel subunit beta-2 | Kcnab2 | E0CXZ9 | 1 |
| Volume-regulated anion channel subunit LRRC8B (Leucine-rich repeat-containing protein 8B) (T-cell activation leucine repeat-rich protein) (TA-LRRP) | Lrrc8b Kiaa0231 | Q5DU41 | 1 |
| Vomeronasal type-1 receptor 44 (Vomeronasal type-1 receptor A10) (Vomeronasal type-1 receptor B11) (Vomeronasal type-1 receptor B4) | Vmn1r44 V1ra10 V1rb11 V1rb4 | Q9EQ47 | 1 |
| von Willebrand factor A domain-containing protein 8 | Vwa8 Kiaa0564 | Q8CC88 | 1 |
| VPS10 domain-containing receptor SorCS2 (Fragment) | Sorcs2 | D3YYF4 | 1 |
| WAP four-disulfide core domain protein 2 (WAP domain-containing protein HE4) | Wfdc2 He4 | Q9DAU7 | 1 |
| WAS/WASL-interacting protein family member 2 (Fragment) | Wipf2 | D3Z0K7 | 1 |
| WASH complex subunit 2 | Washc2 D6Wsu116e Fam21 Kiaa0592 | Q6PGL7 | 1 |
| WASH complex subunit 3 | Washc3 Ccdc53 | S4R287 | 1 |
| WASH complex subunit 3 (Coiled-coil domain-containing protein 53) | Washc3 Ccdc53 | Q9CR27 | 1 |
| WASH complex subunit 3 (Fragment) | Washc3 Ccdc53 | S4R1P7 | 1 |
| WASP homolog-associated protein with actin, membranes and microtubules (WAS protein homology region 2 domain-containing protein 1) (WH2 domain-containing protein 1) | Whamm Kiaa1971 Whdc1 | Q571B6 | 1 |
| WD repeat domain 1 (Fragment) | Wdr1 | Q80ZI9 | 1 |