xanthine

[n] - crystalline oxidation product of the metabolism of nucleoproteins
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Xanthine

A molecular structure found in many common drugs and products (eg caffeine).
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Xanthine

a bronchodilator drug that is used to treat asthma
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Xanthine

Xanthine: A substance found in caffeine, theobromine, and theophylline and encountered in tea, coffee, and the colas. Chemically, xanthine is a purine. There is a genetic disease of xanthine metabolism, xanthinuria, due to deficiency of an enzyme, xanthine dehydrogenase, needed to process xanthine in the body. Unchecked, xanthinuria can lead to kid
Found on http://www.medterms.com/script/main/art.asp?articlekey=18592

xanthine

(= 2,6-dihydroxypurine) A purine, the starting point for purine degradation. Its methylated derivatives (theophylline, theobromine, caffeine) are potent cAMP phosphodiesterase inhibitors.
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Xanthine

Xan'thine noun Also Xan'thin [ Greek xanqo`s yellow.] (Physiol. Chem.) A white microcrystalline nitrogenous compound, C 5 H 4 O 2 N 4 , present in muscle tissue, in the liver, spleen, pancreas, and other organs, and also in urine (in sma
Found on http://www.encyclo.co.uk/webster/X/1

xanthine

<biochemistry> A purine, the starting point for purine degradation. Its methylated derivatives (theophylline, theobromine, caffeine) are potent cAMP phosphodiesterase inhibitors. ... (18 Nov 1997) ...
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xanthine

noun crystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urine
Found on http://wordnetweb.princeton.edu/perl/webwn?s=xanthine

xanthine

(zan´thēn) a purine compound found in most bodily tissues and fluids; it is a precursor of uric acid. Methylated xanthine compounds such as caffeine, theobromine, and theophylline are used for their bronchodilator effects.
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Xanthine

• Alt. of Xanthin
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xanthine

(from the article `purine`) Uric acid, the first purine derivative to be discovered, was isolated in 1776 from urinary calculi; xanthine was obtained from the same source in ... rare inherited disorder of purine metabolism that results from a deficiency in the enzyme xanthine oxidase. Normally this enzyme breaks down the ... [2 rela...
Found on http://www.britannica.com/eb/a-z/x/1

xanthine

(Xan) Type: Term Pronunciation: zan′thēn Definitions: 1. Oxidation product of guanine and hypoxanthine, precursor of uric acid; occurs in many organs and in the urine, occasionally forming urinary calculi; elevated in molybdenum cofactor deficiency and in xanthinuria.
Found on http://www.medilexicon.com/medicaldictionary.php?t=100108

Xanthine

Xanthine (n or n; archaically xanthic acid) (3,7-dihydro-purine-2,6-dione), is a purine base found in most human body tissues and fluids and in other organisms. A number of stimulants are derived from xanthine, including caffeine and theobromine. Xanthine is a product on the pathway of purine degradation. Xanthine is subsequently converted to uric
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Xanthine

Xanthine is a nitrogenous compound closely allied to uric acid, that occurs in extract of meat and in tea. It forms a colourless powder slightly soluble in water, and yields alloxan and urea on oxidation.
Found on http://www.probertencyclopaedia.com/browse/GX.HTM

Xanthine

A substance present in caffeine, theophylline, and theobromine. It is found in coffee, tea, and cola beverages.
Found on http://www.buzzle.com/articles/medical-glossary-definitions-of-medical-term
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