| GAL | galactose; galactosyl; glucuronic acid lactone |
|---|---|
| Gal | galactose |
| gal | galactose; gallon |
| GALBP | galactose-binding protein |
| GALE | galactose epimerase |
| Gal | D(+)galactose |
|---|---|
| GO | D-galactose oxidase |
| GEC | Galactose elimination capacity |
| Gal-1-P | Galactose-1-phosphate |
| GALT | Galactose-1-phosphate uridyl transferase |
| ara operon | <biochemistry, molecular biology> Operons involved in arabinose metabolism, especially. The araBAD operon of E. Coli.Two other ara operons are known in E. Coli. (18 Nov 1997) |
|---|---|
| rrna operon | Genetic loci which direct transcription and translation of ribosomal RNA in bacterial operons. They are designated rrnb, rrnc, rrnd, etc. According to the structural position of the transcription unit in the DNA sequence. (12 Dec 1998) |
| his operon | <molecular biology> An operon which governs the synthesis of the amino acid histidine out of ATP and phosphoribosyl pyrophosphate. The his operon was first observed in and described for the bacteria Salmonella typhinurium. (09 Oct 1997) |
| operon | <molecular biology> Groups of bacterial genes with a common promotor, that are controlled as a unit and produce mRNA as a single piece, polycistronic messenger. An operon consists of two or more structural genes, which usually code for proteins with related metabolic functions and associated control elements that regulate the transcription of the structural genes. The first described example was the lac operon. (18 Nov 1997) |
| Lac operon | Group of adjacent and coordinately controlled genes concerned with the metabolism of lactose in E. Coli. The lac operon was the first example of a group of genes under the control of an operator region to which a lactose repressor binds. When the bacteria are transferred to lactose containing medium, allolactose (which forms by transglycosylation when lactose is present in the cell) binds to the repressor, inhibits the binding of the repressor to the operator and allows transcription of mRNA for enzymes involved in galactose metabolism and transport across the membrane (_ galactosidase, galactoside permease and thiogalactoside transacetylase). (18 Nov 1997) |
| lactose operon | Group of adjacent and coordinately controlled genes concerned with the metabolism of lactose in E. Coli. The lac operon was the first example of a group of genes under the control of an operator region to which a lactose repressor binds. When the bacteria are transferred to lactose containing medium, allolactose (which forms by transglycosylation when lactose is present in the cell) binds to the repressor, inhibits the binding of the repressor to the operator and allows transcription of mRNA for enzymes involved in galactose metabolism and transport across the membrane (_ galactosidase, galactoside permease and thiogalactoside transacetylase). (18 Nov 1997) |
| galactose | <biochemistry> Hexose identical to glucose except that orientation of H and OH on carbon 4 are exchanged. A component of cerebrosides and gangliosides, glycoproteins. Lactose, the disaccharide of milk, consists of galactose joined to glucose by a _(1-4) glycosidic link. (18 Nov 1997) |
| galactose-1-phosphatase | <enzyme> From rat brain; requires mg for activity; phosphate is potent inhibitor Registry number: EC 3.1.3.- (26 Jun 1999) |
| galactose-1-phosphate | A phosphorylated derivative of galactose that is key in galactose metabolism; accumulates in certain types of galactosaemia. (05 Mar 2000) |
| galactose-1-phosphate uridylyltransferase | <enzyme> An enzyme catalyzing the reaction of UTP and alpha-d-galactose 1-phosphate to form UDPgalactose and pyrophosphate, the second and most important step in the metabolism of d-galactose; a deficiency of this enzyme results in an accumulation of galactose, galactose-1-phosphate, and galactitol. (05 Mar 2000) |
| galactose 3-O-sulfotransferase | <enzyme> Catalyses transfer of sulfate from adenosine 3'-phosphosulfate to methyl galactosides or terminal n-acetyllactosamine-containing carbohydrate chains Registry number: EC 2.8.2.- (26 Jun 1999) |
| galactose-6-phosphate dehydrogenase | <enzyme> Possibly a ketoaldose, phosphorylated at primary alcoholic group; found in goat liver cytoplasm, requires nad, has high substrate specificity Registry number: EC 1.1.1.- Synonym: hexose-6-phosphate dehydrogenase (26 Jun 1999) |
| galactose-6-phosphate isomerase | <enzyme> Converts galactose 6-phosphate to tagatose 6-phosphate Registry number: EC 5.3.1.- Synonym: galactose 6-phosphate isomerase, gal-6-p isomerase, tagatose-6-phosphate isomerase (26 Jun 1999) |
| galactose-6-sulfatase | <enzyme> An enzyme that eliminates sulfur from the galactose-6-sulfate residues of certain mucopolysaccharides, producing 3,6-anhydrogalactose residues; it is absent in Morquio's syndrome type A. Synonym: galactose-6-sulfurase. (05 Mar 2000) |
| galactose-6-sulfurase | <enzyme> An enzyme that eliminates sulfur from the galactose-6-sulfate residues of certain mucopolysaccharides, producing 3,6-anhydrogalactose residues; it is absent in Morquio's syndrome type A. Synonym: galactose-6-sulfurase. (05 Mar 2000) |
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