| dehydro- | <prefix> Prefix used in the names of those chemical compounds that differ from other and more familiar compounds in the absence of two hydrogen atoms; e.g., dehydroascorbic acid, which resembles ascorbic acid in all structural features except for its lack of two hydrogen atoms that are present in the ascorbic acid molecule. In systematic nomenclature, didehydro-is preferred as being more exact. (05 Mar 2000) |
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| dehydro-3-epiandrosterone | 3b-hydroxyandrost-5-ene-17-one;a weakly androgenic steroid secreted largely by the adrenal cortex, but also by the testes; one of the principal components of urinary 17-ketosteroids; a precursor of testosterone. Synonym: androstenolone, dehydroisoandrosterone. (05 Mar 2000) |
| 2-dehydro-3-deoxyphosphoheptonate aldolase | <enzyme> An enzyme that catalyses the formation of 7-phospho-2-keto-3-deoxy-d-arabinoheptonate from phosphoenolpyruvate and d-erythrose-4-phosphate. It is one of the first enzymes in the biosynthesis of tyrosine and phenylalanine. Chemical name: 2-Dehydro-3-deoxy-D-arabino-heptonate-7-phosphate D-erythrose-4-phosphate-lyase (pyruvate-phosphorylating) Registry number: EC 4.1.2.15 (12 Dec 1998) |
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| 2-dehydro-3-deoxyphosphooctonate aldolase | <enzyme> Arabinose-5-phosphate + phosphoenolypyruvate yields kdo-8p-p; may be the same as EC 4.1.2.23 which has unphosphorylated substrates; genbank z50747 Registry number: EC 4.1.2.16 Synonym: 2-keto-3-deoxyoctonate-8-phosphate synthetase, 2-kdop-synthetase, kdo 8-phosphate synthase, 3-deoxy-d-manno-octulosonic acid-8-phosphate synthetase, kdo-8-phosphate synthetase, kdsa gene product (26 Jun 1999) |