| quina | Synonym: cinchona. Origin: Sp., fr. Peruv. Quina or kina, cinchona (05 Mar 2000) |
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| quinacrine | <chemical> A fluorescent dye that intercalates into DNA helices. Chromosomes stained with quinacrine show typical banding patterns of fluorescence at specific locations, Q bands, that can be used to recognise chromosomes and their abnormalities. (18 Nov 1997) |
| quinacrine chromosome banding stain | q-banding stain |
| quinacrine hydrochloride | An acridine derivative, C23H30ClN3O-2HCl-2H2O, used as an antimalarial that destroys the trophozoites of Plasmodium vivax and P. Falciparum, but does not affect the gametocytes, sporozoites, or exoerythrocytic stage of parasites; also used as an anthelmintic. As a dihydrochloride, it is used as a stain in cytogenetics to demonstrate Y chromatin by fluorescent microscopy. Quinacrine hydrochloride intercalates with DNA and also uncouples oxidative and photophosphorylation. Synonym: atebrine hydrochloride, mepacrine hydrochloride. (05 Mar 2000) |
| quinacrine mustard | <chemical> 2-methoxy-6-chloro-9-[4-bis(beta-chloroethyl)amino-1-methylbutylamino]acridine. Nitrogen mustard analog of quinacrine used primarily as a stain in the studies of chromosomes and chromatin. Fluoresces by reaction with nucleic acids in chromosomes. Pharmacological action: fluorescent dyes. Chemical name: 1,4-Pentanediamine, N1,N1-bis(2-chloroethyl)-N4-(6-chloro-2-methoxy-9-acridinyl)-, dihydrochloride (12 Dec 1998) |
| quinaldic acid | Quinoline-2-carboxylic acid;a product of l-tryptophan catabolism, via kynurenic acid, found in human urine. Synonym: quinaldinic acid. (05 Mar 2000) |
| quinaldic acid 4-monooxygenase | <enzyme> Catalyses conversion of quinaldic acid to kynurenic acid in presence of oxygen, iron(ii), and NADH; do not confuse with quinaldic acid 4-oxidoreductase Registry number: EC 1.14.13.- (26 Jun 1999) |
| quinaldic acid 4-oxidoreductase | <enzyme> An iron-molybdenum enzyme; converts quinoline 2-carboxylic acid (quinaldate) to kynurenic acid Registry number: EC 1.14.99.- Synonym: quinaldate hydroxylase, quinoline 2-carboxylic acid - (acceptor) 4-oxidoreductase (hydroxylating) (26 Jun 1999) |
| quinaldine | <chemistry> A colourless liquid of a slightly pungent odour, C9H6N.CH3, first obtained as a condensation product of aldehyde and aniline, and regarded as a derivative of quinoline. Synonym: methyl quinoline. Alternative forms: chinaldine. Origin: Quinoline + aldehyde + aniline. Source: Websters Dictionary (01 Mar 1998) |
| quinaldine oxidoreductase | <enzyme> Converts quinaldine to 1h-4-oxoquinaldine; a molybdo-iron/sulfur-flavoprotein; does not use nad, nadp or molecular oxygen Registry number: EC 1.5.99.- Synonym: quinaldine 4-oxidoreductase, quinaldine 4-oxidase (26 Jun 1999) |
| quinaldine red | A styrene-quinolinium iodide; used as a pH indicator (turns red at pH 3.2) in a 1% ethanol solution. (05 Mar 2000) |
| quinaldinic acid | Quinoline-2-carboxylic acid;a product of l-tryptophan catabolism, via kynurenic acid, found in human urine. Synonym: quinaldinic acid. (05 Mar 2000) |
| quiname | <botany> Growing in sets of five; said especially of leaves composed of five leaflets set at the end of a common petiole. Origin: L. Quini five each. Source: Websters Dictionary (01 Mar 1998) |
| quinaphthol | <drug> A drug used as an intestinal antiseptic. (09 Oct 1997) |
| quinaquina | Synonym: cinchona. Origin: a reduplication of Sp. Quina, cinchona (05 Mar 2000) |