| NTD | neural tube defect; nitroblue tetrazolium dye; noise tone difference; 5'-nucleotidase |
|---|---|
| PNBT | p-nitroblue tetrazolium |
| TNT | tetranitroblue tetrazolium; 2,4,6-trinitrotoluene |
| TPT | tetraphenyl tetrazolium; triphalangeal thumb; total protein tuberculin; typhoid-paratyphoid [vaccine... |
| TR | recovery time; rectal temperature; repetition time; residual tuberculin; terminal repeat; tetrazoliu... |
| NADH dehydrogenase | <enzyme> A flavoprotein containing iron. Cytochrome c may act as receptor. The enzyme reversibly catalyses the oxidation of NADH to NAD and reduced acceptor. An inherited deficiency of this complex results in overwhelming acidosis. Synonym: cytochrome c reductase. Chemical name: NADH:(acceptor) oxidoreductase Registry number: EC 1.6.99.3 (12 Dec 1998) |
|---|---|
| NADH-Fe(III)EDTA oxidoreductase | <enzyme> From cryptococcus albidus; catalyses the formation of nad+ and fe(ii)edta from NADH and fe(iii)edta; forms ethylene from 2-oxo-4-methylthiobutyric acid Registry number: EC 1.6.99.- (26 Jun 1999) |
| NADH-hypothiocyanite oxidoreductase | <enzyme> Catalyses reduction of hypothiocyanite to thiocyanate; isolated from streptococcus sanguis Registry number: EC 1.6.99.- Synonym: nhor enzyme (26 Jun 1999) |
| NADH kinase | <enzyme> From saccharomyces cerevisiae; phosphorylate diphosphopyridine nucleotides; found exclusively in the mitochondria Registry number: EC 2.7.1.86 (26 Jun 1999) |
| NADH, NADPH oxidoreductases | <enzyme> A group of oxidoreductases that act on NADH or NADPH. In general, enzymes using NADH or NADPH to reduce a substrate are classified according to the reverse reaction, in which NAD+ or NADP+ is formally regarded as an acceptor. This subclass includes only those enzymes in which some other redox carrier is the acceptor. Registry number: EC 1.6. (12 Dec 1998) |
| NADH-vandate oxidoreductase | <enzyme> Catalyses conversion of vanadate to vanadyl in the presence of NADH but not NADPH Registry number: EC 1.16.- Synonym: NADH-v oxidoreductase (26 Jun 1999) |
| acetoacetyl-CoA reductase | An oxidoreductase catalyzing interconversion of a 3-oxoacyl-CoA and NADPH, and the corresponding d-3-hydroxyacyl-CoA, and NADP+. A step in fatty acid synthesis. (05 Mar 2000) |
| acetohexamide reductase | <enzyme> Catalyses the conversion of acetohexamide to (-)-hydroxyhexamide Registry number: EC 1.1.1.- (26 Jun 1999) |
| acryloyl-CoA reductase | <enzyme> Clostridium kluyveri enzyme; contains fmn, ferredoxin, and flavodoxin; can act as electron donors Registry number: EC 1.3.99.- Synonym: acryloyo-coenzyme a reductase (26 Jun 1999) |
| aflatoxin B1 aldehyde reductase | <enzyme> Catalyses the conversion of the dialdehydic form of aflatoxin b1-dihydrodiol to the dialcohol form Registry number: EC 1.1.1.- Synonym: aflatoxin b1-aldehyde reductase, afb1-ar (26 Jun 1999) |
| aflatoxin B1 reductase | <enzyme> Reduces the cyclopentenone ring of aflatoxin b1 to aflatoxicol; requires NADPH as cofactor Registry number: EC 1.1.1.- (26 Jun 1999) |
| aflatoxin G2a reductase | <enzyme> Has broad substrate specificity in cell-free extracts from aspergillus parasiticus; versicolorin a hemiacetal is reduced to versicolorin c; 17-hydroxy-16,17-dihydrosterigmatocystin is reduced to a 14,17-hydrated derivative; aflatoxin g2a is converted to a 13,16-hydrated derivative of afg2 Registry number: EC 1.1.1.- (26 Jun 1999) |
| aldehyde reductase | <enzyme> An enzyme that catalyses reversibly the oxidation of an aldose to an alditol. It possesses broad specificity for many aldoses. Chemical name: Alditol:NAD(P)+ 1-oxidoreductase Registry number: EC 1.1.1.21 (12 Dec 1998) |
| aldose reductase | A polyol dehydrogenase (NADP+);an oxidoreductase that reversibly converts aldoses to alditols (e.g., glucose to sorbitol) with NADPH as hydrogen donor. An important step in the metabolism of sorbitol and in the formation of diabetic cataracts. See: d-sorbitol-6-phosphate dehydrogenase. (05 Mar 2000) |
| aldose reductase inhibitor | <pharmacology> A class of drugs being studied as a way to prevent eye and nerve damage in people with diabetes. Aldose reductase is an enzyme that is normally present in the eye and in many other parts of the body. It helps change glucose (sugar) into a sugar alcohol called sorbitol. Too much sorbitol trapped in eye and nerve cells can damage these cells, leading to retinopathy and neuropathy. Drugs that prevent or slow (inhibit) the action of aldose reductase are being studied as a way to prevent or delay these complications of diabetes. (09 Oct 1997) |