| glyoxalic | <chemistry> Pertaining to, or designating, an aldehyde acid, intermediate between glycol and oxalic acid. Alternative forms: glyoxylic. Source: Websters Dictionary (01 Mar 1998) |
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| glyoxaline | <chemistry> A white, crystalline, organic base, C3H4N2, produced by the action of ammonia on glyoxal, and forming the origin of a large class of derivatives hence, any one of the series of which glyoxaline is a type. Synonym: oxaline. Source: Websters Dictionary (01 Mar 1998) |
| glyoxime | <chemistry> A white, crystalline, nitrogenous substance, produced by the action of hydroxylamine on glyoxal, and belonging to the class of oximes; also, any one of a group of substances resembling glyoxime proper, and of which it is a type. See Oxime. Origin: Glyoxal + oxime. Source: Websters Dictionary (01 Mar 1998) |
| glyoxisome | <cell biology> Organelle found in plant cells, containing the enzymes of the glyoxylate cycle. Also contains catalase and enzymes for _ oxidation of fatty acids. Together with the peroxisome makes up the class of organelles known as microbodies. Origin: Gr. Soma = body (18 Nov 1997) |
| glyoxylate aminotransferase | <enzyme> Various amino acids can serve as amino donors; with serine it is EC 2.6.1.45; best donors for rat liver and kidney enzyme are leucine and phenylalanine Registry number: EC 2.6.1.- (26 Jun 1999) |
| glyoxylate cycle | <biochemistry> Metabolic pathway present in bacteria and in the glyoxisome of plants, in which two acetyl CoA molecules are converted to a 4 carbon dicarboxylic acid, initially succinate. Includes two enzymes not found elsewhere, isocitrate lyase and malate synthase. Permits net synthesis of carbohydrates from lipid and hence is prominent in those seeds in which lipid is the principal food reserve. (18 Nov 1997) |
| glyoxylate synthetase | <enzyme> Catalyses the condensation of two formate molecules into glyoxylate; a tetramer with mw of 160 kD with a subunit mw of 40 kD; isolated from green potato-tuber chloroplasts Registry number: EC 4.1.3.- (26 Jun 1999) |
| glyoxylate transacetylase | <enzyme> An important enzyme in the glyoxylic acid cycle which reversibly catalyses the synthesis of l-malate from acetyl-CoA and glyoxylate. Chemical name: L-Malate glyoxylate-lyase (CoA-acetylating) Registry number: EC 4.1.3.2 (12 Dec 1998) |
| glyoxyldiureide | <pharmacology> Any of many nitrogen-containing organic compounds which are found in some plants and in the urine of some mammals. Allantoin is used to treat wounds and ulcers. (09 Oct 1997) |
| glyoxylic acid | OHC-COOH;produced by the action of glycine dehydrogenases upon glycine or sarcosine, or from allantoic acid by allantoicase or via alanine:glyoxylate aminotransferase. Synonym: oxoacetic acid. (05 Mar 2000) |
| glyoxylic acid cycle | A catabolic cycle in plants and microorganisms like that of the tricarboxylic acid cycle in animals; its key reaction is the condensation of acetyl-CoA with glyoxylic acid to malic acid (analogous to the condensation of acetyl-CoA and oxaloacetic acid to form citric acid in the tricarboxylic acid cycle). Synonym: Krebs-Kornberg cycle. (05 Mar 2000) |
| glyoxysome | <plant biology> An organelle found only in plants that stores the enzymes responsible for the conversion of lipids to carbohydrates. Origin: Gr. Soma = body (09 Oct 1997) |
| glyphograph | A plate made by glyphography, or an impression taken from such a plate. Source: Websters Dictionary (01 Mar 1998) |
| glyphographic | Of or pertaining to glyphography. Source: Websters Dictionary (01 Mar 1998) |
| glyphography | A process similar to etching, in which, by means of voltaic electricity, a raised copy of a drawing is made, so that it can be used to print from. Origin: Gr. To engrave. Source: Websters Dictionary (01 Mar 1998) |