Guanine

Guanine
One of the four bases in DNA that make up the letters ATGC. Guanine is the "G". The others are adenine, cytosine, and thymine. Guanine always pairs with cytosine to form the base pair G-C (guanine-cytosine) in the DNA. The other base pair in the DNA is A-T (adenine-thymine). Each base pair forms a rung in the DNA ladder. Guanine is also one of the four bases in RNA.
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2-Amino-6-oxypurine; one of the two major purines (the other being adenine) occurring in all nucleic acid s.
- g. aminase SYN: g. deaminase.
- g. deaminase a deaminase of the liver that catalyzes the hydrolysis of g. into xanthine and ammonia; the first step in purine degradation. SYN: guanase, g. aminase.

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gua·nine 'gwän-.ēn n a purine base C5H5N5O that codes genetic information in the polynucleotide chain of DNA or RNA compare ADENINE, CYTOSINE, THYMINE, URACIL

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n.
one of the nitrogen-containing bases (see purine) that occurs in the nucleic acids DNA and RNA.

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gua·nine (gwahґnēn) a purine base, in animal and plant cells usually occurring condensed with ribose or deoxyribose to form the nucleosides guanosine and deoxyguanosine; these nucleosides are components of nucleic acids and of free nucleotides important in metabolism. Symbol G. See also illustration of purine and pyrimidine bases, under base.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Guanine — Structure de la 1,9H guanine Général …   Wikipédia en Français

  • guanine — [ gwanin ] n. f. • 1858; de guano ♦ Biochim. Une des quatre bases azotées, constituant des acides ribonucléique et désoxyribonucléique. Dans l A. D. N. « la Guanine (G) s associe avec la Cytosine (C) » (Monod). ● guanine nom féminin (de guano)… …   Encyclopédie Universelle

  • guanine — guanine. См. гуанин. (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.

  • guanine — 1850, from GUANO (Cf. guano), from which the chemical first was isolated, + chemical suffix INE (Cf. ine) (2) …   Etymology dictionary

  • guanine — [gwä′nēn΄, gwä′nin] n. [< GUANO (a commercial source of the base) + INE3] a crystalline purine base, C5H5N5O, contained in the nucleic acids of all tissue: it links with cytosine in the DNA structure …   English World dictionary

  • Guanine — chembox ImageFile1 = Guanine chemical structure.png ImageSize1 = 150px ImageFileL2 = Guanine 3D balls.png ImageSizeL2 = 100px ImageFileR2 = Guanine 3D vdW.png ImageSizeR2 = 100px IUPACName = 2 amino 1 H purin 6(9 H ) one OtherNames = 2 amino 6… …   Wikipedia

  • guanine — /gwah neen/, n. Biochem. a purine base, C5H5N5O, that is a fundamental constituent of DNA and RNA, in which it forms base pairs with cytosine. Symbol: G Cf. guanosine. [GUAN(O) + INE2] * * * Organic compound of the purine family, often called a… …   Universalium

  • guanine — guaninas statusas T sritis chemija formulė C₅H₂N₄(NH₂)OH santrumpa( os) Gua atitikmenys: angl. guanine rus. гуанин ryšiai: sinonimas – 2 amino 6 purinolis …   Chemijos terminų aiškinamasis žodynas

  • guanine — guaninas statusas T sritis augalininkystė apibrėžtis Azotinė bazė ( purino darinys), įeinanti į DNR sudėtį. atitikmenys: angl. guanine rus. гуанин …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • Guanine nucleotide exchange factor — Guanine nucleotide exchange factors (GEFs) are components of intracellular signalling networks. They function as activators of small GTPases (see Nucleotide exchange factor). In their resting state, G proteins are bound to Guanosine diphosphate… …   Wikipedia

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