| dihydropyrimidinase | <enzyme> Catalyses the hydrolytic cleavage of imides that range from linear to heterocyclic and that include hydantoins, dihydropyrimidines and phthalimides; displays stereoselectivity and stereospecificity for some substrates Registry number: EC 3.5.2.2 Synonym: hydantoinase, hydropyrimidine hydrase, dhpase, dihydropyrimidine acid hydrolase, dihydropyrimidine amidohydrolase, imidase, dihydropyrimidine aminohydrolase (26 Jun 1999) |
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| dihydropyrimidine dehydrogenase | <enzyme> An enzyme in pyrimidine biosynthesis that reacts 5,6-dihydrouracil with NADP+ to form uracil and NADPH; it also acts on dihydrothymine; a deficiency of this enzyme can result in hyperuracil thyminuria. Synonym: dihydrouracil dehydrogenase. (05 Mar 2000) |
| dihydrostreptomycin | An aminoglycoside antibiotic similar in action to streptomycin but with a higher risk of ototoxicity. (05 Mar 2000) |
| dihydrostreptomycin sulfate | <chemical> A semi-synthetic aminoglycoside antibiotic that is used in the treatment of tuberculosis. Pharmacological action: antibiotics, aminoglycoside, antibiotics, antitubercular. Chemical name: D-Streptamine, O-2-deoxy-2-(methylamino)-alpha-L-glucopyranosyl-(1-2)-O-5-deoxy- 3-C-(hydroxymethyl)-alpha-L-lyxofuranosyl-(1-4)-N,N'-bis(aminoiminomethyl)-, sulfate (2:3) (salt) (12 Dec 1998) |
| dihydrostreptomycin-6-phosphate 3' alpha-kinase | <enzyme> Catalyses the phosphorylation of dihydrostreptomycin 6-phosphate in the 3'-position in the presence of ATP Registry number: EC 2.7.1.88 Synonym: dihydrostreptomycin-6-p 3' alpha-kinase (26 Jun 1999) |
| dihydrotachysterol | <chemical> 9,10-secoergosta-5,7,22-trien-3 beta-ol. Chemical name: 9,10-Secoergosta-5,7,22-trien-3-ol, (3beta,5E,7E,10alpha,22E)- (12 Dec 1998) |
| dihydrotestosterone | <chemical> Chemical name: Androstan-3-one, 17-hydroxy-, (5alpha,17beta)- (12 Dec 1998) |
| dihydrouracil | 5,6-Dihydrouracil;a reduction product of uracil and one of the intermediates of uracil catabolism. (05 Mar 2000) |
| dihydrouracil dehydrogenase | <enzyme> Uses nad Registry number: EC 1.3.1.1 Synonym: dihydrothymine dehydrogenase (26 Jun 1999) |
| dihydrouracil oxidase | <enzyme> Oxygen dependent; no cofactor required, forms uracil irreversibly; enzyme from rhodosporidium toruloides Registry number: EC 1.3.3.- (26 Jun 1999) |
| dihydrouridine | <biochemistry> An unusual pyrimidine which is the result of adding two hydrogen atoms to a uridine (another nitrogenous base). It is found only in tRNA molecules. (09 Oct 1997) |
| dihydroxy- | <prefix> Prefix denoting addition of two hydroxyl groups; as a suffix, becomes -diol. (05 Mar 2000) |
| dihydroxyacetone | <chemical> 1,3-dihydroxy-2-propanone. A ketotriose compound. Its addition to blood preservation solutions results in better maintenance of 2,3-diphosphoglycerate levels during storage. It is readily phosphorylated to dihydroxyacetone phosphate by triokinase in erythrocytes. In combination with naphthoquinones it acts as a sunscreening agent. Chemical name: 2-Propanone, 1,3-dihydroxy- (12 Dec 1998) |
| dihydroxyacetone phosphate | This is an intermediate molecule involved in the fourth step of glycolysis. Dihydroxyacetonephosphate is created from fructose 1,6-bisphosphate. In step 5, it is converted into its positional isomer, glyceraldehyde3-phosphate, with the aid of triose-phosphate isomerase. (09 Oct 1997) |
| dihydroxyaluminum aminoacetate | Dihydroxy(glycinato)aluminum; (glycinato-N,O) dihydroxyaluminum;basic aluminum glycinate, a basic aluminum salt of aminoacetic acid containing small amounts of aluminum hydroxide and aminoacetic acid; used as an antacid in hyperchlorhydria and peptic ulcer. (05 Mar 2000) |