| aspartic acid | <amino acid> One of the twenty naturally occurring amino acids. Has the following chemical characteristics: pKa1 pKa2 pKa3 pI Water Solubility (30deg C)2.09-3.86 9.82 2.97 0.6 (09 Oct 1997) |
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| aspartic acid 2-oxoglutarate-dependent dioxygenase | <enzyme> Hydroxylates one aspartic acid residue in the first egf-like unit of factor ix Registry number: EC 1.14.11.- Synonym: aspartate 2-oxoglutarate dioxygenase, asp-2-og-dioxygenase, aspartyl beta-hydroxylase, aspartyl (asparaginyl) beta-hydroxylase (26 Jun 1999) |
| aspergillic acid | 2-Hydroxy-3-isobutyl-6-(1-methylpropyl)pyrazine-1-oxide;produced by Aspergillus flavus; an antibiotic agent moderately active against Gram-positive and Gram-negative bacteria, but toxic to animal tissues. (05 Mar 2000) |
| Aspergillus acid proteinase | <enzyme> Included in the group of microbial carboxyl proteinases EC 3.4.23.6; has been sequenced; genbank d87681 Registry number: EC 3.4.23.- Synonym: apfap, aspergillus fumigatus acid proteinase, aspergillus niger acid proteinase, aspergillus awamori acid proteinase (26 Jun 1999) |
| atractosylidic acid | The steroid aglycon and toxic principle of atractylic acid. Synonym: atractosylidic acid, atractylin. (05 Mar 2000) |
| atractylic acid | A highly poisonous steroid glycoside from Atractylis gummifera L. (Compositae), having a strychnine-like action that produces convulsions of a hypoglycaemic nature; the aglycon, atractyliginin, is combined with glucose and isovaleric acid, and is the toxic principle. Atractylic acid interferes with oxidative reactions, the citric acid cycle, and nerve conduction. (05 Mar 2000) |
| aureolic acid | An antibiotic produced by Streptomyces argillaceus and S. Tanashiensis; possesses antineoplastic activity. Synonym: aureolic acid, mitramycin. (05 Mar 2000) |
| aurintricarboxylic acid | <chemical> 5-((3-carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl)-2-hydroxybenzoic acid. A dye which inhibits protein biosynthesis at the initial stages. The ammonium salt (aluminon) is a reagent for the colourimetric estimation of aluminum in water, foods, and tissues. Chemical name: Benzoic acid, 5-((3-carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl)-2-hydroxy- (12 Dec 1998) |
| azetidinecarboxylic acid | <chemical> 2-azetidinecarboxylic acid. A proline analog. Acts as a stoichiometric replacement of proline causing the production of abnormal proteins having impaired biological activity. Chemical name: 2-Azetidinecarboxylic acid (12 Dec 1998) |
| Baker's acid haematein | An acidic solution of oxidised haematoxylin used on frozen sections for staining phospholipids. (05 Mar 2000) |
| barbituric acid | <chemistry> A white, crystalline substance, derived from alloxantin, also from malonic acid and urea, and regarded as a substituted urea. Source: Websters Dictionary (01 Mar 1998) |
| basic amino acid | An amino acid containing a second basic group (usually an amino group); e.g., lysine, arginine, ornithine. Synonym: dibasic amino acid. (05 Mar 2000) |
| Bauer's chromic acid leucofuchsin stain | <technique> A stain for glycogen and fungi utilizing chromic acid as an oxidizing agent of polysaccharides, followed by Schiff's reagent; glycogen and fungi cell walls appear deep red. (05 Mar 2000) |
| behenic acid | CH3(CH2)20COOH;a constituent of most fats and fish oils; large amounts are found in jamba, mustard seed, rapeseed oils, and cerebrosides. Synonym: n-docosanoic acid. (05 Mar 2000) |
| benzoic acid | C6H5COOH;occurs naturally in gum benzoin; it is used as a food preservative, locally as a fungistatic, and orally as an antiseptic, diuretic, and expectorant. It is excreted rapidly as hippuric acid. Synonym: benzoyl hydrate, flowers of benzoin. (05 Mar 2000) |