| choline monooxygenase | <enzyme> Catalyses conversion of choline to the hydrate form of betaine aldehyde. Registry number: EC 1.- Synonym: cmo enzyme (26 Jun 1999) |
|---|---|
| choline o-acetyltransferase | <enzyme> An enzyme that catalyses the formation of acetylcholine from acetyl-CoA and choline. Chemical name: Acetyl-CoA:choline O-acetyltransferase Registry number: EC 2.3.1.6 (12 Dec 1998) |
| choline phosphatase | <enzyme> An enzyme found mostly in plant tissue. It hydrolyzes glycerophosphatidates with the formation of a phosphatidic acid and a nitrogenous base such as choline. This enzyme also catalyses transphosphatidylation reactions. Chemical name: Phosphatidylcholine phosphatidohydrolase Registry number: EC 3.1.4.4 (12 Dec 1998) |
| choline-phosphate cytidylyltransferase | <enzyme> An enzyme that catalyses the transfer of cytidylate (CMP) to choline phosphate to form CDPcholine. It is the rate-limiting enzyme in the choline pathway for the biosynthesis of phosphatidylcholine. Its activity is increased by glucocorticoids. Registry number: EC 2.7.7.15 (12 Dec 1998) |
| choline phosphokinase | <enzyme> An enzyme that is active in the first step of choline phosphoglyceride (lecithin) biosynthesis by catalyzing the phosphorylation of choline to phosphorylcholine in the presence of ATP. Ethanolamine and its methyl and ethyl derivatives can also act as acceptors. Chemical name: ATP:choline phosphotransferase Registry number: EC 2.7.1.32 (12 Dec 1998) |
| choline salicylate | Choline salt of salicyclic acid, an analgesic and antipyretic (because of the salicylate moiety). (05 Mar 2000) |
| choline theophyllinate | A true salt of theophylline; it has mild diuretic, myocardial stimulating vasodilator, and bronchodilator actions, with the same uses as theophylline, but is better absorbed and less irritating. Synonym: choline theophyllinate. (05 Mar 2000) |
| cytidine diphosphate choline | <chemical> Donor of choline in biosynthesis of choline-containing phosphoglycerides. Pharmacological action: nootropic agents. Chemical name: Cytidine 5'-(trihydrogen diphosphate), P'-(2-(trimethylammonio)ethyl) ester, inner salt (12 Dec 1998) |
| aluminum magnesium silicate | An antacid. Synonym: aluminum magnesium silicate. (05 Mar 2000) |
| calcium magnesium-atpase | <enzyme> An enzyme that catalyses the hydrolysis of ATP and is activated by millimolar concentrations of either calcium or magnesium. Unlike calcium-transporting atpase it does not require the second divalent cation for its activity, and is not sensitive to orthovanadate. Registry number: EC 3.6.1.- (12 Dec 1998) |
| calcium magnesium dependent endodeoxyribonuclease | <enzyme> Similar in action but different from dnase i Registry number: EC 3.1.21.- Synonym: ca mg dnase, ca(2+)+mg(2+) dnase, calcium-magnesium endonuclease, ca-mg endonuclease (26 Jun 1999) |
| magnesium | <chemical, element> An essential divalent cation. The major role is as the chelated ion in ATP and presumably other triphosphonucleotides. The magnesium ATP complex is the sole biologically active form of ATP. The other essential role of magnesium is as the central ion of chlorophyll. Cellular concentration is less than 5mM. Serum concentration approximately 1mM. Pharmacologic action: Hypomagnesemia can cause refractory ventricular fibrillation or ventricular tachycardia. Uses: known hypomagnesemic states - suspect hypomagnesmia in alcoholics, chronic disease states, or others with poor nutrition; treatment of choice for Torsade de Pointes. Dose: 1-2 grams IV push for cardiac arrest, over 1 to 2 minutes for Torsades, and over 5 to 60 minutes for acute myocardial infarction. Potential complications: Transient flushing and diaphoresis, sinus bradycardia, hypotension, hyporeflexia and paralysis with overdose. Abbreviation: Mg (15 Mar 2000) |
| magnesium aluminum silicate | An antacid. Synonym: aluminum magnesium silicate. (05 Mar 2000) |
| magnesium bacteriopheophytinate | <microbiology, plant biology> Varieties of chlorophyll (bacteriochlorophylls a, b, c, d, e and g) found in photosynthetic bacteria and differing from plant chlorophyll in the substituents around the tetrapyrrole nucleus of the molecule and in the absorption spectra. (18 Nov 1997) |
| magnesium benzoate | Has been used in gout and rheumatoid arthritis. (05 Mar 2000) |