| glyceraldehdye 3 phosphate | <biochemistry> Three carbon intermediate of the glycolytic pathway formed by the cleavage of fructose 1,6 bisphosphate, catalysed by the enzyme aldolase. Also involved in reversible interchange between glycolysis and the pentose phosphate pathway. (18 Nov 1997) |
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| glyceraldehyde 3-phosphate | <biochemistry> In glycolysis, glyceraldehyde 3-phosphate is created from dihydroxyacetone phosphate with the aid of triose-phosphate isomerase. In turn, it an dorganic phosphate and NAD+ are converted into 1,3-bisphosphoglycerate, NADH and free hydrogen with the aid of glyceraldehyde 3-phosphate dehydrogenase. (09 Oct 1997) |
| glyceraldehyde 3-phosphate dehydrogenase | <biochemistry> In glycolysis, this enzyme catalyses the conversion of glyceraldehyde 3-phosphate and organic phosphate and NAD+ into 1,3-bisphosphoglycerate and NADH and free hydrogens (and viceversa) by transferring hydrogens and electrons between the molecules. (09 Oct 1997) |
| glyceraldehyde-3-phosphate ferredoxin oxidoreductase | <enzyme> N-terminal amino acid sequence given in first source Registry number: EC 1.2.7.- Synonym: gapor (26 Jun 1999) |
| glyceraldehyde 3-phosphate phosphatase | <enzyme> Groundnut enzyme converts glyceraldehyde 3-phosphate to glyceraldehyde Registry number: EC 3.1.3.- Synonym: glph phosphatase (26 Jun 1999) |
| pentose phosphate cycle | <biochemistry> A pathway of hexose oxidation in which glucose-6-phosphate undergoes two successive oxidations by NADP, the final one being an oxidative decarboxylation to form a pentose phosphate. Diverges from this when glucose-6-phosphate is oxidized to ribose 5 phosphate by the enzyme glucose-6 phosphate dehydrogenase. This step reduces NADP to NADPH, generating a source of reducing power in cells for use in reductive biosyntheses. In plants, part of the pathway functions in the formation of hexoses from carbon dioxide in photosynthesis. Also important as source of pentoses, for example for nucleic acid biosynthesis. This pathway is the main metabolic pathway in neutrophils, congenital deficiency in the pathway produces sensitivity to infection. Alternative metabolic route to Embden Meyerhof pathway for breakdown of glucose. (18 Nov 1997) |
| pentose phosphate pathway | <biochemistry> A pathway of hexose oxidation in which glucose-6-phosphate undergoes two successive oxidations by NADP, the final one being an oxidative decarboxylation to form a pentose phosphate. Diverges from this when glucose-6-phosphate is oxidized to ribose 5 phosphate by the enzyme glucose-6 phosphate dehydrogenase. This step reduces NADP to NADPH, generating a source of reducing power in cells for use in reductive biosyntheses. In plants, part of the pathway functions in the formation of hexoses from carbon dioxide in photosynthesis. Also important as source of pentoses, for example for nucleic acid biosynthesis. This pathway is the main metabolic pathway in neutrophils, congenital deficiency in the pathway produces sensitivity to infection. Alternative metabolic route to Embden Meyerhof pathway for breakdown of glucose. (18 Nov 1997) |
| retinyl phosphate | The phosphoester of all-trans retinol; essential for the biosynthesis of certain glycoproteins needed for growth regulation and for mucous secretion. (05 Mar 2000) |
| riboflavin 5'-phosphate | <biochemistry> This biomolecule serves as a coenzyme for some enzymes that catalyse oxidation-reduction reactions. (09 Oct 1997) |
| ribose-5-phosphate | Ribose phosphorylated on carbon-5; an intermediate in the pentose phosphate pathway. (05 Mar 2000) |
| ribose-5-phosphate isomerase | <enzyme> An enzyme catalyzing interconversion of d-ribose 5-phosphate and d-ribulose 5-phosphate; of importance in ribose metabolism and in the pentose phosphate pathway. Synonym: phosphopentose isomerase, phosphoriboisomerase. (05 Mar 2000) |
| ribose-phosphate pyrophosphokinase | <enzyme> An enzyme that catalyses the formation of phosphoribosyl pyrophosphate from ATP and ribose-5-phosphate. Chemical name: ATP:ribose-5-phosphate pyrophosphotransferase Registry number: EC 2.7.6.1 (12 Dec 1998) |
| guaiacol phosphate | Phosphoric guaiacyl ether, a white crystalline powder, insoluble in water; used as an intestinal antiseptic and in fever. (05 Mar 2000) |
| RNA 3'-terminal phosphate cyclase | <enzyme> ATP dependent; forms 2',3' terminal cyclic phosphate on RNA which is then the substrate for RNA ligase of hela cells Registry number: EC 6.5.- Synonym: RNA tph cyclase (26 Jun 1999) |
| choline-phosphate cytidylyltransferase | <enzyme> An enzyme that catalyses the transfer of cytidylate (CMP) to choline phosphate to form CDPcholine. It is the rate-limiting enzyme in the choline pathway for the biosynthesis of phosphatidylcholine. Its activity is increased by glucocorticoids. Registry number: EC 2.7.7.15 (12 Dec 1998) |