| 12 beta-hydroxysteroid dehydrogenase | <enzyme> Isolated from clostridium paraputrificum; nadp-dependent; reduces 12-keto groups in conjugated and unconjugated acids and oxidised a 12 beta-hydroxy function Registry number: EC 1.1.1.- Synonym: 12beta-hydroxysteroid dehydrogenase (26 Jun 1999) |
|---|---|
| 1,3-beta-glucan synthase | <enzyme> Amino acid sequence given in second source; genbank u09275 Registry number: EC 2.4.1.34 Synonym: chrysolaminarin synthase, udp glucuose beta(1--3)glucan-beta-3-glucosyltransferase, callose synthase, glucan synthase 1 gene product (26 Jun 1999) |
| 1,4-beta-chitobiosidase | <enzyme> Catalyses the hydrolysis of chitin to release chitobiose from non-reducing ends of chains; note: exochitinase has been used for enzymes that release monomeric or dimeric products--this record applies to the enzyme(s) that release chitobiose Registry number: EC 3.2.1.- Synonym: chitobiosidase, exochitinase (chitobiose-releasing) (26 Jun 1999) |
| 1-beta-d-ribofuranosylcytosine | <biochemistry> Nucleoside consisting of D ribose and the pyrimidine base cytosine. (18 Nov 1997) |
| 1-beta-d-ribofuranosyluracil | <biochemistry> The ribonucleoside formed by the combination of ribose and uracil. (18 Nov 1997) |
| lactatriaosylceramide beta 1-3 galactosyltransferase | <enzyme> Glycolipid beta 1-3 galactosyltransferase Registry number: EC 2.4.1.- Synonym: ltc 1-3 galactosyltransferase (26 Jun 1999) |
| 2-O-alpha-D-glucopyranosyl-O-beta-D-galactopyranosyl-hydroxylysine glucohydrolase | <enzyme> Responsible for catabolism of hydroxylysine-linked disaccharide unit derived from collagen in mammals Registry number: EC 3.2.1.- Synonym: glc-gal-hyl glucohydrolase, ggh-glucohydrolase (26 Jun 1999) |
| 3 alpha-hydroxysteroid-5 beta-oxidoreductase | <enzyme> From digitalis lanata; specific for 5 beta-pregnan-3-ones; does not act on 5 alpha-pregnane-3-ones or delta 4/delta 5-pregnenes Registry number: EC 1.1.1- Synonym: 3a ohs oxidoreductase (26 Jun 1999) |
| 3 beta,20 alpha-hydroxysteroid oxidoreductase | <enzyme> From calf foetal red blood cells; 17 beta-hydroxy-5 alpha-androstan-3-one and progesterone can act as substrates of 3 beta and 20 alpha reductase activities, respectively Registry number: EC 1.1.1.- Synonym: 3,20-hs oxidoreductase (26 Jun 1999) |
| 3 beta-hydroxy-delta 5-C(27)-steroid dehydrogenase | <enzyme> Second enzyme in the sequence that converts cholesterol to bile acids; deficiency leads to chronic liver disease in childhood Registry number: EC 1.1.1.- Synonym: 7 alpha-hydroxycholesterol 3 beta-dehydrogenase, 7-hydroxycholesterol 3-dehydrogenase, 3 beta-hydroxy-delta(5)-c(27)-steroid oxidoreductase, 5-cholestene-3beta,7alpha-diol oxidase (26 Jun 1999) |
| 3 beta-hydroxysteroid oxidoreductase-delta(5) 3-ketosteroid isomerase | <chemical> System found in breast cancers; consists of EC 1.1.1.145 (progesterone reductase) and EC 5.3.3.1 (steroid delta-isomerase)) Synonym: 3 ohsteroid dehydrogenase-isomerase, delta 5-3 beta hydroxysteroid dehydrogenase-isomerase, 3 beta-hydroxysteroid dehydrogenase-isomerase, 3 beta-hydroxysteroid dehydrogenase-delta(5)-delta(4)-isomerase, 3 beta-hydroxysteroid dehydrogenase-5--4-ene-isomerase, 3-beta-hydroxysteroid dehydrogenase-delta(5-4)-isomerase, 3 beta hydroxysteroid dehydrogenase-delta5-delta4-isomerasease, 3 beta-ol dehydrogenase-delta(4)-delta(5) isomerase, 3 beta-hydroxy-5-ene steroid dehydrogenase-delta 5-delta 4 isomerase (26 Jun 1999) |
| 3 (or 17)-beta-hydroxysteroid dehydrogenase | <enzyme> Acts on both 3 beta or 17 beta hydroxysteroids; 17 beta type 1 is probably estradiol dehydrogenases; for 3 or 17 alpha-hydroxysteroids see EC 1.1.1.209; was mapped to testosterone dehydrongenases (85-93) (see under 17-hydroxysteroid dehydrogenases (85-90); on-line search 17-hydroxysteroid dehydrogenases (85-93), index medicus search testosterone dehydrogenases (91-93), 17-hydroxysteroid dehydrogenases (85-90) Registry number: EC 1.1.1.51 Synonym: 3 beta,17 beta-hydroxysteroid dehydrogenase, 3,17-beta-hsdase, 17beta-hydroxysteroid dehydrogenase, 17beta hsd1 (26 Jun 1999) |
| 3-oxo-5 beta-steroid delta 4-dehydrogenase | <enzyme> Do not confuse with EC 1.3.1.23 (cholestenone 5 beta-reductase) which is also steroid 5 beta-reductase in chemline; do not use for enzyme using NADP-see EC 1.3.1.23 and EC 1.3.1.3 Chemical name: 3-oxo-5 beta-steroid delta(4)dehydrogenase Registry number: EC 1.3.99.6 Synonym: steroid 5 beta-reductase, testosterone 5 beta-reductase, 4-ene-5 beta-reductase, delta(4)-3-ketosteroid-5 beta-(acceptor)-reductase, testosterone 5beta-reductase, delta(4)-5beta-reductase, cytosolic 4-ene-reductase (26 Jun 1999) |
| 4-androstene-3,17-dione-16 beta-hydroxylase | <enzyme> Catalyses androst-4-en-3,17-dione to 16 beta-hydroxyandrost-4-en-3,17-dione; cytochrome p450 2b1 is both a androstenedione 16beta-hydroxylase and a testosterone 16beta-hydroxylase Registry number: EC 1.14.99.- Synonym: aedo-16-hydroxylase, steroid 16-hydroxylase, cytochrome p450 2b2, cyp 2b2, cyp2b2 (26 Jun 1999) |
| 4-methylumbelliferyl-beta-galactosidase | <enzyme> Non-specific brain enzyme; distinct from EC 3.2.1.46 Registry number: EC 3.2.1.- Synonym: 4-mub-galactosidase (26 Jun 1999) |