| tetrahydromethanopterin S-methyltransferase | <enzyme> Catalyses transfer of methyl groups from methyltetrahydromethanopterin to 2-mercaptoethanesulfonate; component of methane synthesizing complex of methanobacterium thermoautotrophicum; enzyme contains 5-hydroxybenzimidazolyl cobamide Registry number: EC 2.1.1.86 Synonym: thmpt methyltransferase, tetrahydromethanopterin methyltransferase, meh4mpt-com methyltransferase, methyltetrahydromethanopterin-coenzyme m methyltransferase, 5-methyl-5,6,7,8-tetrahydromethanopterin - 2-mercaptoethanesulfonate 2-methyltransferase, n5-methyltetrahydromethanopterin-coenzyme m methyltransferase, n(5)-methyltetrahydromethanopterin-coenzyme m methyltransferase (26 Jun 1999) |
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| tetrahydronaphthalenes | Partially saturated 1,2,3,4-tetrahydronaphthalene compounds. (12 Dec 1998) |
| tetrahydropapaveroline | <chemical> 1-(3,4-dihydroxybenzyl)-1,2,3,4-tetrahydro-6,7-isoquinolinediol. A leukomaine (animal alkaloid) formed in brain and liver from dopamine and l-dopa; it may be implicated in psychiatric problems. Chemical name: 6,7-Isoquinolinediol, 1-((3,4-dihydroxyphenyl)methyl)-1,2,3,4-tetrahydro- (12 Dec 1998) |
| tetrahydroprotoberberine oxidase | <enzyme> From berberis wilsoniae; catalyses in the presence of oxygen the removal of four hydrogen atoms from the c ring of tetrahydroprotoberberines with production of 4 mol of h2o2 and h2o Registry number: EC 1.3.3.- Synonym: thpb oxidase, tetrahydroberberine oxidase (26 Jun 1999) |
| tetrahydrouridine | <chemical> 1-(beta-d-ribofuranosyl)-4-hydroxy-3,4,5-tetrahydro-pyrimidin-2(1h)-one. An inhibitor of nucleotide metabolism. Pharmacological action: antimetabolites. Chemical name: 2(1H)-Pyrimidinone, tetrahydro-4-hydroxy-1-beta-D-ribofuranosyl- (12 Dec 1998) |
| tetrahydroxynaphthalene reductase | <enzyme> Catalyses the NADPH-dependent reduction of 1,3,6,8-tetrahydroxynaphthalene into scytalone and 1,3,8-trihydroxynaphthalene into vermelone; genbank l22309 Registry number: EC 1.3.1.50 Synonym: t4hn reductase, scytalone-nadp(+) delta(5)-oxidoreductase, NADPH-dependent tetrahydroxynaphthalene reductase, polyhydroxynaphthalene reductase, thr1 gene product, 1,3,8-trihydroxynaphthalene reductase (26 Jun 1999) |
| tetrahydrozoline hydrochloride | A sympathomimetic agent related to ephedrine, used as a topical nasal and conjunctival decongestant; excessive amounts may convert an acute congestion into a chronic reactive hyperaemia. (05 Mar 2000) |
| Tetrahymena | Genus of ciliate protozoa frequently used in studies on ciliary axonemes, self splicing RNA and telomere replication. (18 Nov 1997) |
| tetrahymena pyriformis | A species of ciliate protozoa used extensively in genetic research. (12 Dec 1998) |
| tetrahymena thermophila | A species of ciliate protozoa used in genetic and cytological research. (12 Dec 1998) |
| tetrahymenina | A suborder of ciliate protozoa. most organisms are free-living in fresh water and many species are used extensively for experimental studies. (12 Dec 1998) |
| tetraiodophenolphthalein sodium | A radiographic contrast medium. The disodium salt was once used in radiography of the gallbladder. Synonym: tetraiodophenolphthalein sodium. (05 Mar 2000) |
| tetraisopropylpyrophosphamide | <chemical> N,n',n'',n'''-tetraisopropylpyrophosphamide. A specific inhibitor of pseudocholinesterases. It is commonly used experimentally to determine whether pseudo- or acetylcholinesterases are involved in an enzymatic process. Pharmacological action: cholinesterase inhibitor. Chemical name: Diphosphoramide, N,N',N'',N'''-tetrakis(1-methylethyl)- (12 Dec 1998) |
| tetrakishexahedron | <chemistry> A tetrahexahedron. Origin: Gr. Four times + E. Hexahedron. Source: Websters Dictionary (01 Mar 1998) |
| tetrakosane | <chemistry> A hydrocarbon, C24H50, resembling paraffin, and like it belonging to the marsh-gas series; so called from having twenty-four atoms of carbon in the molecule. Origin: Tetra- + Gr. Twenty. Source: Websters Dictionary (01 Mar 1998) |