| methicillin sodium | Sodium 2,6-dimethoxyphenylpenicillin monohydrate;a semisynthetic penicillin salt for parenteral administration; restriction of its use to infections caused by penicillin G-resistant staphylococci is recommended; it is less effective than penicillin G in infections caused by haemolytic streptococci, pneumococci, gonococci, and penicillin G-sensitive staphylococci. Synonym: sodium methicillin. (05 Mar 2000) |
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| methide | <chemistry> A binary compound of methyl with some element; as, aluminium methide, Al2(CH3)6. Source: Websters Dictionary (01 Mar 1998) |
| methimazole | <chemical> 1,3-dihydro-1-methyl-2h-imidazole-2-thione. A thioureylene antithyroid agent that inhibits the formation of thyroid hormones by interfering with the incorporation of iodine into tyrosyl residues of thyroglobulin. This is done by interfering with the oxidation of iodide ion and iodotyrosyl groups through inhibition of the peroxidase enzyme. Pharmacological action: antithyroid agents. Chemical name: 2H-Imidazole-2-thione, 1,3-dihydro-1-methyl- (12 Dec 1998) |
| methiocarb | <chemical> 4-(methylthio)-3,5-xylyl-n-methylcarbamate. Insecticide, molluscacide, acaricide. Pharmacological action: insecticide, carbamate, molluscacides. Chemical name: Phenol, 3,5-dimethyl-4-(methylthio)-, methylcarbamate (12 Dec 1998) |
| methiocarb sulfoxidase | <enzyme> Sulfide is oxidised to sulfoxide; from microsomes of soybean cotyledons; did not require NADP, fad of cytochrome p450 cofactors Registry number: EC 1.8.- (26 Jun 1999) |
| methiodal sodium | An iodine-containing radiopaque medium, formerly used for examination of the urinary tract. (05 Mar 2000) |
| methionate | <chemistry> A salt of methionic acid. Source: Websters Dictionary (01 Mar 1998) |
| methionic | <chemistry> Of, pertaining to, or designating, a sulphonic (thionic) acid derivative of methane, obtained as a stable white crystalline substance, CH2.(SO3H)2, which forms well defined salts. Source: Websters Dictionary (01 Mar 1998) |
| methionine | <biochemistry> Contains the SCH3 group that can act as a methyl donor (see S adenosyl methionine). Common in proteins but at low frequency. The met x linkage is subject to specific cleavage by cyanogen bromide. See: formyl peptides. (18 Nov 1997) |
| methionine acetyltransferase | <enzyme> Catalyses the amino-terminal acetylation Registry number: EC 2.3.1.- Synonym: methionine n(alpha)-acetyltransferase (26 Jun 1999) |
| methionine adenosyltransferase | <enzyme> An enzyme that catalyses the synthesis of s-adenosylmethionine from methionine and ATP. Chemical name: ATP:L-methionine S-adenosyltransferase Registry number: EC 2.5.1.6 (12 Dec 1998) |
| methionine decarboxylase | <enzyme> From fern dryopteris filix-mas; pyridoxal 5'-phosphate required for activity; converts methionine to 3-(methylthio)propionaldehyde Registry number: EC 4.1.1.57 Synonym: l-methionine decarboxylase (26 Jun 1999) |
| methionine malabsorption syndrome | <syndrome> An inherited disorder in which there is an inability to absorb l-methionine from the gut. (05 Mar 2000) |
| methionine puddle | <biochemistry> A term used to describe a region of a protein surface composed of a cluster of methionine side chains. Proposed as the active hydrophobic site of calmodulin and also of signal recognition particle (SRP). The concept is of a highly fluid hydrophobic patch. (18 Nov 1997) |
| methionine S-methyltransferase | <enzyme> Catalyses synthesis of s-methylmethionine from l-methionine and s-adenosylmethionine Registry number: EC 2.1.1.12 Synonym: s-adenosyl-l-methionine - l-methionine s-methyltransferase (26 Jun 1999) |