Xanthine

Xanthine
Xanthine Xan"thine, n. Also Xanthin Xan"thin . [Gr. xanqo`s yellow.] (Physiol. Chem.) A type of purine obtainable as a white microcrystalline powder, {C5H4O2N4}, present in muscle tissue, in the liver, spleen, pancreas, and other organs, and also in urine (in small quantities) and some urinary calculi, and in the juices of certain plants; -- so called because it leaves a yellow residue when evaporated to dryness with nitric acid. It is also present in guano. Xanthine is closely related to uric acid. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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  • Xanthine — Général N …   Wikipédia en Français

  • xanthine — [ gzɑ̃tin ] n. f. • 1890; du gr. xanthos « jaune » et ine ♦ Biochim. Base organique dérivée de la purine et qui donne sa couleur jaune à l urine. ● xanthine nom féminin Base purique entrant dans la composition des nucléotides et des acides… …   Encyclopédie Universelle

  • xanthine — xanthine. См. ксантин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • xanthine — [zan′thēn΄, zan′thin] n. [Fr: see XANTHO & IN1] 1. a white, crystalline, nitrogenous compound, C5H4N4O2, resembling uric acid: it is present in blood, urine, and certain plants 2. any of various derivatives of this compound …   English World dictionary

  • Xanthine — Not to be confused with xanthene. Xanthine …   Wikipedia

  • 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 …   Medical dictionary

  • Xanthine — Strukturformel Allgemeines Name Xanthin Andere Namen 2,6 Dihydroxypurin 2,6(1H,3H) Purindion …   Deutsch Wikipedia

  • xanthine — noun Etymology: International Scientific Vocabulary Date: 1857 a feebly basic compound C5H4N4O2 that occurs especially in animal or plant tissue, is derived from guanine and hypoxanthine, and yields uric acid on oxidation; also any of various… …   New Collegiate Dictionary

  • xanthine — (gzan ti n ) s. f. Terme de chimie. Matière colorante de la garance.    Xanthine azotée, oxyde xanthique, principe découvert dans quelques calculs urinaires de l homme, et qui paraît exister aussi en grande quantité dans le guano. ÉTYMOLOGIE… …   Dictionnaire de la Langue Française d'Émile Littré

  • xanthine — n. a nitrogenous breakdown product of the purines adenosine and guanine. Xanthine is an intermediate product of the breakdown of nucleic acids to uric acid …   The new mediacal dictionary

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