| uridine diphosphoxylose | <biochemistry> Monosaccharide pentose that is found in xylans, very abundant components of hemicelluloses. (18 Nov 1997) |
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| uridine kinase | <enzyme> An enzyme that catalyses the phosphorylation of uridine and cytidine to uridine 5'-phosphate and cytidine 5'-phosphate, respectively. ATP, dutp, dGTP, and datp are effective phosphate donors. Chemical name: ATP:uridine 5'-phosphotransferase Registry number: EC 2.7.1.48 (12 Dec 1998) |
| uridine monophosphate | <chemical> 5'-uridylic acid. A uracil nucleotide containing one phosphate group esterified to the sugar moiety in the 2', 3' or 5' position. Chemical name: 5'-Uridylic acid (12 Dec 1998) |
| uridine monophosphate kinase | <enzyme> Catalyses the phosphorylation of ump to udp; an aspect of EC 2.7.4.4 Registry number: EC 2.7.4.- Synonym: ump kinase, uridine-5-monophosphate kinase, uridylate kinase (26 Jun 1999) |
| uridine nucleosidase | <chemical> Chemical name: nucleosidase, uridine Synonym: uridine ribohydrolase (26 Jun 1999) |
| uridine phosphorylase | <enzyme> An enzyme that catalyses the transfer of ribose from uridine to orthophosphate, forming uracil and ribose 1-phosphate. Chemical name: Uridine:orthophosphate alpha-D-ribosyltransferase Registry number: EC 2.4.2.3 (12 Dec 1998) |
| uridine-specific acid nuclease | <enzyme> Chicken liver enzyme hydrolyzes poly(u) and e. Coli RNA Registry number: EC 3.1.- (26 Jun 1999) |
| uridine triphosphatase | <enzyme> Rn in chemline for deoxyuridine triphosphatase: EC 3.6.1.23 Registry number: EC 3.6.1.- Synonym: utpase (26 Jun 1999) |
| uridine triphosphate | A molecule which consists of the nitrogenous base uracil linked to the sugar ribose and which has a chain of three phosphate groups attached to the ribose in a linear fashion. UTP is required during transcription since it is a direct precursor of RNA. (09 Oct 1997) |
| adenosine 5'-diphosphate | A condensation product of adenosine with pyrophosphoric acid, formed from ATP by the hydrolysis of the terminal phosphate group of the latter compound. Acronym: ADP (05 Mar 2000) |
| adenosine diphosphate | <biochemistry> ADP is used as an adenine, a ribose and a diphosphate unit. (06 May 1997) |
| adenosine diphosphate glucose | <chemical> Serves as the glycosyl donor for formation of bacterial glycogen, amylose in green algae, and amylopectin in higher plants. Chemical name: Adenosine 5'-(trihydrogen diphosphate), P'-alpha-D-glucopyranosyl ester (12 Dec 1998) |
| adenosine diphosphate ribose | <chemical> Adenosine 5'-(trihydrogen diphosphate),5'-5-ester with d-ribose. An ester formed between the aldehydic carbon of ribose and the terminal phosphate of adenosine diphosphate. Serves as a ribose carrier. Chemical name: Adenosine 5'-(trihydrogen diphosphate), P'-5-ester with D-ribose (12 Dec 1998) |
| adenosine diphosphate ribose cyclase | <enzyme> Catalyses conversion of nadp to 2'-phospho-cyclic adenosine diphosphoribose; do not use for formation of cyclic adpribose (see ADP-ribosyl cyclase) Registry number: EC 4.6.- Synonym: 2'-p-adpr cyclase (26 Jun 1999) |
| adenosine diphosphate sugars | Esters formed between the aldehydic carbon of sugars and the terminal phosphate of adenosine diphosphate. (12 Dec 1998) |