| arabinosyltransferase | <enzyme> Emba and embb isolated from mycobacterium avium; polymerises arabinose into the arabinan of arabinogalactan; genbank u66560 Registry number: EC 2.4.2.- Synonym: emba gene product, embb gene product, arabinan arabinosyl transferase, alpha-1-3-arabinosyltransferase (26 Jun 1999) |
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| arabinoxylan | Polysaccharide with a backbone of xylose (_ 1,4 linked) with side chains of arabinose (_ 1,3 linked): constituent of hemicellulose of angiosperm cell wall. (18 Nov 1997) |
| arabist | One well versed in the Arabic language or literature; also, formerly, one who followed the Arabic system of surgery. Origin: Cf. F. Arabiste. Source: Websters Dictionary (01 Mar 1998) |
| arabitol | C5H12O5; 1,2,3,4,5-pentanepentol;a sugar alcohol obtained from the reduction of arabinose. (05 Mar 2000) |
| arabs | Members of a semitic people inhabiting the arabian peninsula or other countries of the middle east and north africa. The term may be used with reference to ancient, medieval, or modern ethnic or cultural groups. (12 Dec 1998) |
| araC | <molecular biology> In bacteria, the arabinose ara operon regulatory protein. One of a large group of bacterial transcription factors with the helix turn helix motif. (18 Nov 1997) |
| araceous | <botany> Of or pertaining to an order of plants, of which the genus Arum is the type. Origin: L. Arum a genus of plants, fr. Gr. Source: Websters Dictionary (01 Mar 1998) |
| arachic acid | CH3(CH2)18COOH;a fatty acid contained in peanut oil, butter, and other fats. Synonym: arachic acid, n-eicosanoic acid, n-icosanoic acid. Origin: Arachis, fr. G. Arakis, leguminous weed (05 Mar 2000) |
| arachidic acid | CH3(CH2)18COOH;a fatty acid contained in peanut oil, butter, and other fats. Synonym: arachic acid, n-eicosanoic acid, n-icosanoic acid. Origin: Arachis, fr. G. Arakis, leguminous weed (05 Mar 2000) |
| arachidonate | <biochemistry> An essential unsaturated fatty acid that humans use to synthesise regulatory molecules such as prostaglandins and thromboxanes. It is found in fatty animal tissue such as egg yolk and liver. (09 Oct 1997) |
| arachidonate 12-lipoxygenase | <enzyme> An enzyme that catalyses the oxidation of arachidonic acid to yield 12-hydroperoxyarachidonate (12-hpete) which is itself rapidly converted by a peroxidase to 12-hydroxy-5,8,10,14-eicosatetraenoate (12-hete). The 12-hydroperoxides are preferentially formed in platelets. Chemical name: Arachidonate:oxygen 12-oxidoreductase Registry number: EC 1.13.11.31 (12 Dec 1998) |
| arachidonate 15-lipoxygenase | <enzyme> An enzyme that catalyses the oxidation of arachidonic acid to yield 15-hydroperoxyarachidonate (15-hpete) which is rapidly converted to 15-hydroxy-5,8,11,13-eicosatetraenoate (15-hete). The 15-hydroperoxides are preferentially formed in neutrophils and lymphocytes. Chemical name: Arachidonate:oxygen 15-oxidoreductase Registry number: EC 1.13.11.33 (12 Dec 1998) |
| arachidonate 5-lipoxygenase | <enzyme> An enzyme that catalyses the oxidation of arachidonic acid to yield 5-hydroperoxyarachidonate (5-hpete) which is rapidly converted by a peroxidase to 5-hydroxy-6,8,11,14-eicosatetraenoate (5-hete). The 5-hydroperoxides are preferentially formed in leukocytes. Chemical name: Arachidonate:oxygen 5-oxidoreductase Registry number: EC 1.13.11.34 (12 Dec 1998) |
| arachidonate 8-lipoxygenase | <enzyme> From sea whip coral plexaura homomalla; catalyses the conversion of arachidonic acid to a cyclised prostanoid with a pga ring and the same side chains as the parent arachidonate Registry number: EC 1.13.11.40 Synonym: 8(r)-lipoxygenase, 8-lipoxygenase (26 Jun 1999) |
| arachidonate epoxygenase | <enzyme> Requires cytochrome p-450; uses NADPH and oxygen; forms 5,6-,8,9-11,12- and 14,15-cis-epoxyeicosatrienoic acids; p4502caa is the form isolated from rabbit renal cortex Registry number: EC 1.14.13.- Synonym: NADPH-dependent arachidonic acid epoxygenase, cytochrome p-450 epoxygenase, cytochrome p-450 arachidonate oxygenase, cyp2j2, cyp2caa, cytochrome p-450 2caa (26 Jun 1999) |