guanine nucleotide
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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
Nucleotide exchange factor — Nucleotide exchange factors (NEFs) are proteins that stimulate the exchange (replacement) of nucleoside diphosphates for nucleoside triphosphates bound to other proteins. Function Many cellular proteins cleave (hydrolyze) nucleoside… … Wikipedia
Nucleotide — Nucléotide Les nucléotides sont des acides désoxyribonucléiques pour l ADN et ribonucléiques pour l ARN. Un nucléotide est composé de 3 parties : un groupement phosphate (ou acide phosphorique), identique pour les nucléotides de l ADN et de… … Wikipédia en Français
Guanine — Structure de la 1,9H guanine Général … Wikipédia en Français
Nucleotide sugar — Nucleotide sugars are the activated forms of monosaccharides. Nucleotide sugars act as glycosyl donors in glycosylation reactions. Those reactions are catalyzed by a group of enzymes called glycosyltransferases. Contents 1 History 2 Biological… … Wikipedia
Nucleotide — Nucleotides are molecules that, when joined together, make up the structural units of RNA and DNA. In addition, nucleotides participate in cellular signaling (cGMP and cAMP), and are incorporated into important cofactors of enzymatic reactions… … Wikipedia
Nucleotide salvage — A salvage pathway is a pathway in which nucleotides (purine and pyrimidine) are synthesized from intermediates in the degradative pathway for nucleotides. Salvage pathways are used to recover bases and nucleosides that are formed during… … Wikipedia
Nucléotide — Structure des nucléotides Un nucléotide est une molécule organique composée d une nucléobase, d un pentose et de 1 à 3 groupements phosphates. Certains nucléotides forment la base de l ADN et de l ARN, d autres sont des cofacteurs ou coenzymes.… … Wikipédia en Français
nucleotide — /nooh klee euh tuyd , nyooh /, n. Biochem. any of a group of molecules that, when linked together, form the building blocks of DNA or RNA: composed of a phosphate group, the bases adenine, cytosine, guanine, and thymine, and a pentose sugar, in… … Universalium
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
