| Urea transporter 2 | Humans | Mediates the transport of urea driven by a concentration gradient across the cell membrane of the renal inner medulla... more | 2 | Details |
| Urease subunit alpha | Enterobacter aerogenes | Not Available | 2 | Details |
| Urease subunit alpha | Bacillus pasteurii | Not Available | 2 | Details |
| Urease subunit beta | Bacillus pasteurii | Not Available | 1 | Details |
| Urease subunit gamma | Bacillus pasteurii | Not Available | 1 | Details |
| Uric acid | Humans | Not Available | 3 | Details |
| Uric acid degradation bifunctional protein | Bacillus sp. (strain TB-90) | Catalyzes two steps in the degradation of uric acid, i.e. the oxidation of uric acid to 5-hydroxyisourate (HIU) and t... more | 2 | Details |
| Uridine 5'-monophosphate synthase | Humans | Bifunctional enzyme catalyzing the last two steps of de novo pyrimidine biosynthesis, orotate phosphoribosyltransfera... more | 6 | Details |
| Uridine phosphorylase | Escherichia coli (strain K12) | Catalyzes the reversible phosphorylytic cleavage of uridine to uracil and ribose-1-phosphate. Shows weak activity tow... more | 8 | Details |
| Uridine phosphorylase | Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) | Not Available | 1 | Details |
| Uridine phosphorylase | Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720) | Catalyzes the reversible phosphorylytic cleavage of uridine to uracil and ribose-1-phosphate. | 1 | Details |
| Uridine phosphorylase 1 | Humans | Catalyzes the reversible phosphorylytic cleavage of uridine to uracil and ribose-1-phosphate which can then be utiliz... more | 3 | Details |
| Uridine phosphorylase 2 | Humans | Catalyzes the reversible phosphorylytic cleavage of uridine to uracil and ribose-1-phosphate which can then be utiliz... more | 2 | Details |
| Uridine-cytidine kinase 2 | Humans | Phosphorylates uridine and cytidine to uridine monophosphate and cytidine monophosphate. Does not phosphorylate deoxy... more | 4 | Details |
| Uridine-cytidine kinase-like 1 | Humans | Phosphorylates uridine and cytidine to uridine monophosphate and cytidine monophosphate | 4 | Details |
| Urocanate hydratase | Pseudomonas putida (strain KT2440) | Catalyzes the conversion of urocanate to 4-imidazolone-5-propionate. | 1 | Details |
| Urokinase plasminogen activator surface receptor | Humans | GPI-anchored receptor that recruits and activates the urokinase-type plasminogen activator (uPA) at the cell surface.... more | 5 | Details |
| Urokinase-type plasminogen activator | Humans | Serine protease that cleaves the inactive precursor plasminogen at a specific Arg-Val peptide bond, converting it int... more | 43 | Details |
| Uroporphyrinogen decarboxylase | Humans | Catalyzes the sequential decarboxylation of the four acetate side chains of uroporphyrinogen to form coproporphyrinog... more | 2 | Details |
| Uroporphyrinogen-III C-methyltransferase | Pseudomonas denitrificans | Catalyzes the two successive C-2 and C-7 methylation reactions involved in the conversion of uroporphyrinogen III to ... more | 1 | Details |
| uroporphyrinogen-III C-methyltransferase | Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579) | Not Available | 1 | Details |
| Urotensin-2 receptor | Humans | G protein-coupled receptor for the vasoactive neuropeptides urotensin-2 and urotensin-2B. Upon ligand binding, activa... more | 1 | Details |
| Usherin | Humans | Involved in hearing and vision as member of the USH2 complex. In the inner ear, required for the maintenance of the h... more | 1 | Details |
| Uteroglobin | Humans | Binds phosphatidylcholine, phosphatidylinositol, polychlorinated biphenyls (PCB) and weakly progesterone, potent inhi... more | 2 | Details |
| Utrophin | Humans | May play a role in anchoring the cytoskeleton to the plasma membrane | 5 | Details |