| methyl yellow | C6H5N:NC6H4N(CH3)2;a fat-soluble yellow dye (MW 225) that has hepatic carcinogenic action in experimental animals; used as an indicator of pH (red, at pH 2.9, yellow at pH 4.0). Synonym: dimethylaminoazobenzene, methyl yellow. (05 Mar 2000) |
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| methyl-CCNU | A nitrosourea antineoplastic agent resembling carmustine (BCNU) and lomustine (CCNU). Synonym: semustine. (05 Mar 2000) |
| methyl-p-hydroxyphenyllactate esterase | <enzyme> May be involved in regulation of cell growth in normal and neoplastic tissues Registry number: EC 3.1.1.- Synonym: mehpla-ase (26 Jun 1999) |
| methyl-tert-butyl ether | Used to dissolve gallbladder stones. Acronym: MTBE (05 Mar 2000) |
| methylacrylic acid | Occurs in oil from Roman camomile; used in the manufacture of methacrylate resins and plastics. Synonym: methylacrylic acid. (05 Mar 2000) |
| methylal | <chemistry> A light, volatile liquid, H2C(OCH3)2, regarded as a complex ether, and having a pleasant ethereal odour. It is obtained by the partial oxidation of methyl alcohol. Synonym: formal. Source: Websters Dictionary (01 Mar 1998) |
| methylamine | <chemistry> See Methyl amine, under Methyl. Source: Websters Dictionary (01 Mar 1998) |
| methylamine dehydrogenase | <enzyme> Forms formaldehyde and hydrogen peroxide; paracoccus denitrificans contains covalently bound pyrroloquinoline quinone as prosthetic group Registry number: EC 1.4.99.- Synonym: methylamine oxidase, quinoprotein methylamine dehydrogenase, madh, mau gene product, methylamine utilization gene product (26 Jun 1999) |
| methylamphetamine hydrochloride | D-Desoxyephedrine hydrochloride; d-N,alpha-dimethylphenethylamine hydrochloride, "speed";a sympathomimetic agent that exerts greater stimulating effects upon the central nervous system than does amphetamine; widely used by drug abusers via the oral and intravenous ("mainlining") routes; strong psychic dependence may develop. Synonym: methylamphetamine hydrochloride. (05 Mar 2000) |
| methylaspartate mutase | <enzyme> Composed of 2 readily separable subunits mute and muts; see records for component e, glutamate mutase (mute) and component s, glutamate mutase (muts) Registry number: EC 5.4.99.1 Synonym: glutamate mutase (26 Jun 1999) |
| methylate | 1. To add methyl alcohol to ethanol to render it undrinkable. 2. To replace an atom, usually a hydrogen, with a methyl group. (09 Oct 1997) |
| methylated | <chemistry> Impregnated with, or containing, methyl alcohol or wood spirit; as, methylated spirits. Source: Websters Dictionary (01 Mar 1998) |
| methylated spirit | Ethyl alcohol rendered unfit for consumption as a beverage by the addition of one or several chemicals for commercial purposes (e.g., sucrose octa-acetate). Synonym: industrial methylated spirit, methylated spirit. (05 Mar 2000) |
| methylation | Addition of methyl groups. In histo-chemistry methylation is used to esterify carboxyl groups and remove sulfate groups by treating tissue sections with hot methanol in the presence of hydrochloric acid. (12 Dec 1998) |
| methylatropine bromide | A quaternary derivative of atropine that is less lipid soluble and hence produces fewer central nervous system actions; a cycloplegic. Synonym: atropine methylbromide. (05 Mar 2000) |
| 4-methyl-5-nitrocatechol oxygenase | <enzyme> Catalyses conversion of 4-methyl-5-nitrocatechol to 2-hydroxy-5-methylquinone; dntb isolated from burkholderia; genbank u68411 Registry number: EC 1.13.12.- Synonym: mnc oxygenase, dntb gene product (26 Jun 1999) |
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| 4-methylmuconolactone methyl-isomerase | <enzyme> From nocardioform actinomycetes; forms 3-methylmuconolactone Registry number: EC 5.3.3.- Synonym: 4-methyl-2-enelactone methylisomerase, mmlm-isomerase (26 Jun 1999) |
| 4-methyl sterol demethylase | <chemical> This term is used to describe 10 reactions in the collective processes of monooxygenation, decarboxylation and reduction, which, together account for the conversion of each of the two 4-methyl groups of lanosterol to carbon dioxide Chemical name: demethylase, methyl sterol Synonym: 4,4-dimethylzymosterol monooxygenase, sterol 4-demethylase (26 Jun 1999) |
| 4-toluene sulfonate methyl monooxygenase | <enzyme> From comamonas testosteroni t-2; catalyses the transformation of toluene sulfonate or p-toluate to the corresponding alcohol and the methyl side-chain to the corresponding acid in the presence of o2 and NADH; p- and m- toluates and 4-ethylbenzoate are substrates, whereas p-xylene, toluene and p-cresol are not substrates; enzyme also catalyses the demethylation of 4-methoxybenzoate to 4-hydroxybenzoate and formaldehyde; comprises reductase b and oxygenase m Registry number: EC 1.14.13.- Synonym: tsmoxygenase, tsmos, p-ts methyl-monooxygenase, tsam protein, tsab protein (26 Jun 1999) |