| alpha-ribazole | 1-alpha-d-ribofuranosyl-5,6-dimethylbenzimidazole;the benzimidazole nucleoside in vitamin B12. (05 Mar 2000) |
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| alpha-santonin-1,2-reductase | <enzyme> From pseudomonas cichorii s.; catalyses the reduction of the 1,2-double bond of santonin; NADH or NADPH dependent Registry number: EC 1.3.1.- Synonym: santonin 1,2-reductase (26 Jun 1999) |
| alpha-sarcin | A fungal toxin that acts on the large subunit of rRNA and inactivates the ribosome. (05 Mar 2000) |
| alpha-streptococci | Streptococci that form a green variety of reduced haemoglobin in the area of the colony on a blood agar medium. (05 Mar 2000) |
| alpha-tocopherol | <chemical> A light yellow, viscous, odourless, oily liquid that deteriorates on exposure to light, is obtained from wheat germ oil or by synthesis, biologically exhibits the most vitamin E activity of the alpha-tocopherol's, and is an antioxidant retarding rancidity by interfering with the autoxidation of fats. Prepared from natural phytol, it is called 2-ambo-alpha-tocopherol; from synthetic phytol, all-rac-alpha-tocopherol or synt-alpha-tocopherol; also available are d-alpha-tocopheryl acetate, dl-alpha-tocopheryl acetate, d-alpha-tocopheryl acid succinate, and d-alpha-tocopheryl acetate concentrate. One of several forms of vitamin E. Chemical name: 2,5,7,8-tetramethyl-2-(4',8',12'-trimeth yltridecyl)-6-chromanol; 5,7,8-trimethyltocol Synonym: vitamin E. (14 Aug 2000) |
| alpha-tubulin acetylase | <enzyme> From chlamydomonas flagella; catalyses the acetylation of alpha-tubulin-l-lysine in the presence of acetyl-CoA to yield CoA and alpha-tubulin n(epsilon)-acetyl-l-lysine Registry number: EC 2.3.1.108 Synonym: alpha-tubulin acetyltransferase (26 Jun 1999) |
| alpha1-2,alpha1-3,alpha1-6-mannosidase | <enzyme> From rat liver; releases alpha1-2, alpha1-3, alpha1-6 linked residues from oligosaccharide substrates; end product of reaction is manalpha1-3(manalpha1-6)manbeta1-4glcnac; mw 110 kD; inhibited by edta, zn++ and cu++, swainsonine and 1-deoxymannojirimycin Registry number: EC 3.2.1.- Synonym: 2,3,6-alpha-mannosidase (26 Jun 1999) |
| alpha2-8-KDN-transferase | <enzyme> Catalyses the transfer of deaminated neuraminic acid, kdn (2-keto-3-deoxy-d-glycero-d-galacto-nononic acid) from cmp-kdn to the non-reducing termini of oligo-polysialyl chains of polysialoglycoprotein Registry number: EC 2.4.99.- Synonym: kdn-transferase (26 Jun 1999) |
| alphabet | 1. The letters of a language arranged in the customary order; the series of letters or signs which form the elements of written language. 2. The simplest rudiments; elements. "The very alphabet of our law." (Macaulay) Deaf and dumb alphabet. See Dactylology. Origin: L. Alphabetum, fr. Gr. +, the first two Greek letters; Heb. Aleph and beth: cf. F. Alphabet. Source: Websters Dictionary (01 Mar 1998) |
| alphabetically | In an alphabetic manner; in the customary order of the letters. Source: Websters Dictionary (01 Mar 1998) |
| alphadione | An intravenous anaesthetic containing two steroids, alfaxalone, and alfadolone acetate, dissolved in 20% polyoxyethylated castor oil. (05 Mar 2000) |
| alphaherpesvirinae | <virology> A subfamily of herpesviridae characterised by a short replication cycle. There are two genera: simplexvirus and varicellovirus. (12 Dec 1998) |
| alphaprodine | <chemical> An opioid analgesic chemically related to and with an action resembling that of meperidine, but more rapid in onset and of shorter duration. It has been used in obstetrics, as pre-operative medication, for minor surgical procedures, and for dental procedures. Pharmacological action: analgesics, opioid, narcotics. Chemical name: 4-Piperidinol, 1,3-dimethyl-4-phenyl-, propanoate (ester), cis- (12 Dec 1998) |
| alphasone acetophenide | <chemical> (16 alpha(r))-16,17-((1-phenylethylidene)bis(oxy))pregn-4-ene-3,20-dione. A progesterone that has been used in estrus synchronization and has been evaluated as an injectable contraceptive in combination with estradiol enanthate. It is also used therapeutically as a topical anti-inflammatory and is applied topically in the treatment of acne. Pharmacological action: steroidal anti-inflammatory agents, topical anti-inflammatory agents, contraceptives, oral, synthetic, progestational hormones, synthetic. Chemical name: Pregn-4-ene-3,20-dione, 16,17-((1-phenylethylidene)bis(oxy))-, (16alpha(R))- (12 Dec 1998) |
| alphavirus | A genus of togaviridae, also known as group a arboviruses, serologically related to each other but not to other togaviridae. The viruses are transmitted by mosquitoes. The type species is the sindbis virus. (12 Dec 1998) |
| 3 beta,20 alpha-hydroxysteroid oxidoreductase | <enzyme> From calf foetal red blood cells; 17 beta-hydroxy-5 alpha-androstan-3-one and progesterone can act as substrates of 3 beta and 20 alpha reductase activities, respectively Registry number: EC 1.1.1.- Synonym: 3,20-hs oxidoreductase (26 Jun 1999) |
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| 4-alpha-d-glucanotransferase | Dextrin transglycosylase or glycosyltransferase;a 4-glycosyltransferase converting maltodextrins into amylose and glucose by transferring parts of 1,4-glucan chains to new 4-positions on glucose or other 1,4-glucans. Synonym: amylomaltase, D enzyme, dextrin glycosyltransferase, dextrin transglycosylase, disproportionating enzyme. (05 Mar 2000) |
| 4 alpha-glucanotransferase | <enzyme> D-enzyme from plants claimed to be different from amylomaltase, but given same EC number Registry number: EC 2.4.1.25 Synonym: amylomaltase, disproportionating enzyme, d-enzyme, dextrin glycosyl-transferase, gtase, maltodextrin glycosyltransferase (26 Jun 1999) |
| (4-fluorophenyl)-alpha-methyl-5-benzoxazole methylamine | Amine derivative of flunoxaprofen. Pharmacological action: fluorescent dye Synonym: s-flopa (26 Jun 1999) |
| L-alpha-glycerol-phosphate oxidase | <enzyme> Uses molecular oxygen; forms hydrogen peroxide and dehydroxyacetonephosphate Registry number: EC 1.1.3.- Synonym: glycerolphosphate oxidase (26 Jun 1999) |
| l-alpha-narcotine | <chemical> A naturally occurring opium alkaloid that is a centrally acting antitussive agent. Pharmacological action: antitussive agents. Chemical name: 1(3H)-Isobenzofuranone, 6,7-dimethoxy-3-(5,6,7,8-tetrahydro-4-methoxy-6-methyl-1,3-dioxolo(4,5-g)isoquinolin-5-yl)-, (S-(R*,S*))- (12 Dec 1998) |
| 4-methylumbelliferyl alpha-galactosidase | <enzyme> Aspect of EC 3.2.1.22, alpha-galactosidase Registry number: EC 3.2.1.- (26 Jun 1999) |
| 4-nitrophenyl-alpha-glucosidase | <enzyme> Involved in glycoprotein precessing; cleaves 1-3 linked glucose residues Registry number: EC 3.2.1.- Synonym: pnp-alpha-d-glucosidase, para-nitrophenyl-alpha-glucosidase, glucosidase II (26 Jun 1999) |
| 4-nitrophenyl-alpha-N-acetylglucosaminidase | <enzyme> Aspect of EC 3.2.1.50 Registry number: EC 3.2.1.- Synonym: pnpanacglase, para-nitrophenyl-alpha-n-acetylglucosaminidase, 4-nitrophenyl-n-acetyl-beta-d-glucosaminidase (26 Jun 1999) |
| 5-phospho-alpha-d-ribosyl 1-pyrophosphate | 5-Phosphoribosyl 1-diphosphate;d-Ribose carrying a phosphate group on ribose carbon-5 and a pyrophosphate group on ribose carbon-1; an intermediate in the formation of the pyrimidine and purine nucleotides as well as NAD+. Synonym: 5-phosphoribose 1-diphosphate. Acronym: PRPP (05 Mar 2000) |
| 6-hydroxymethylbenzo(alpha)pyrene synthetase | <enzyme> Catalyses hydroxymethylation of benzo(alpha)pyrene to the 16-hydroxymethyl derivative Registry number: EC 2.1.2.- (26 Jun 1999) |
| 6-ketoprostaglandin f1 alpha | <chemical> The physiologically active and stable hydrolysis product of epoprostenol. Found in nearly all mammalian tissue. Chemical name: Prost-13-en-1-oic acid, 9,11,15-trihydroxy-6-oxo-, (9alpha,11alpha,13E,15S)- (12 Dec 1998) |
| 6-phospho-alpha-glucosidase | <enzyme> Hydrolyzes maltose-6'-phosphate to glucose-6-phosphate Registry number: EC 3.2.1.- Synonym: 6-phosphoryl-o-alpha-d-glucopyranosyl - 6-phosphoglucohydrolase, maltose-6'-phosphate glucosidase, maltose 6-phosphate hydrolase, malh gene product (26 Jun 1999) |
| folylpoly-alpha-glutamate synthetase | <enzyme> Synthesises alpha-carboxyl-linked folylpolyglutamates Registry number: EC 6.3.2.- Synonym: fpa glutamate synthase (26 Jun 1999) |
| 7-alpha-cephem-methoxylase | <chemical> Rn refers to cmci; 2-protein component which converts cephalosporin c to 7-methoxycephalosporin c; encoded by 2 closely-linked genes which are required for hydroxylation at c-7 and transfer of me to the 7-hydroxycephem intermediate; genbank z21685 and z21686 Synonym: 7-cephem hydroxylase, 7-hydroxycephem methyltransferase (26 Jun 1999) |