| uro- | Urine. See: ure-, urin-. Origin: G. Ouron (05 Mar 2000) |
|---|---|
| uroammoniac | Relating to uric acid and ammonia; denoting a variety of urinary calculus. (05 Mar 2000) |
| uroanthelone | <endocrinology> A peptide isolated from human urine that inhibits gastric acid secretion. Now known to be identical to epithelial growth factor. (18 Nov 1997) |
| urobilin | <physiology> A yellow pigment identical with hydrobilirubin, abundant in the highly coloured urine of fever, and also present in normal urine. See Urochrome. Origin: 1st uro- + bile + -in. Source: Websters Dictionary (01 Mar 1998) |
| urobilin IX-a | Mesobilene- A bilirubinoid. See: urobilin. Synonym: urobilin IX-a. (05 Mar 2000) |
| urobilinaemia | The presence of urobilins in the blood. (05 Mar 2000) |
| urobilinogen | <chemical> A colourless compound formed in the intestines by the reduction of bilirubin. Some is excreted in the feces where it is oxidised to urobilin. Some is reabsorbed and re-excreted in the bile as bilirubin. at times, it is re-excreted in the urine, where it may be later oxidised to urobilin. Chemical name: 21H-Biline-8,12-dipropanoic acid, 2,17-diethyl-1,4,5,10,15,16,19,22,23,24-decahydro-3,7,13,18-tetramethyl-1,19-dioxo- (12 Dec 1998) |
| urobilinogen IXa | A reduced mesobilirubin with no double bonds between the pyrrole rings and, consequently, colourless. See: bilirubinoids. Synonym: mesobilirubinogen, urobilinogen IXa. (05 Mar 2000) |
| urobilinuria | The presence in the urine of urobilins in excessive amount, formed mainly from haemoglobin. (05 Mar 2000) |
| urocanase | <enzyme> An enzyme that catalyses the conversion of 4,5-dihydro-4-oxo-5-imidazolepropanoate to urocanate and water. Chemical name: 4,5-Dihydro-4-oxo-5-imidazolepropanoate hydro-lyase Registry number: EC 4.2.1.49 (12 Dec 1998) |
| urocanate | A salt or ester of urocanic acid. Urocanate hydratase, an enzyme catalyzing the reaction of water with urocanic acid to produce 4-imidazolone-5-propionic acid, a step in l-histidine catabolism; this enzyme is absent in cases of urocanic aciduria. Synonym: urocanase. (05 Mar 2000) |
| urocanate hydratase | <enzyme> An enzyme that catalyses the conversion of 4,5-dihydro-4-oxo-5-imidazolepropanoate to urocanate and water. Chemical name: 4,5-Dihydro-4-oxo-5-imidazolepropanoate hydro-lyase Registry number: EC 4.2.1.49 (12 Dec 1998) |
| urocanic acid | <chemical> 4-imidazoleacrylic acid. Chemical name: 2-Propenoic acid, 3-(1H-imidazol-4-yl)- (12 Dec 1998) |
| urocanic aciduria | Elevated levels of urocanic acid in the urine. (05 Mar 2000) |
| urocanicase | One of a group of at least three enzymes that convert urocanic acid to glutamic acid. (05 Mar 2000) |