Nucleoside-diphosphate kinases (NDKs, also NDP Kinase, (poly)nucleotide kinases and nucleoside diphosphokinases) are enzymes that catalyze the exchange of phosphate groups between different nucleoside diphosphates. NDK activities maintain an equilibrium between the concentrations of different nucleoside triphosphates such as, for example, when GTP...
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http://en.wikipedia.org/wiki/Nucleoside-diphosphate_kinase
<enzyme> A phosphotransferase enzyme that is found in mitochondria and in the soluble cytoplasm of cells. ... It catalyses reversible reactions of a nucleoside triphosphate, e.g., ATP, with a nucleoside diphosphate, e.g., UDP, to form ADP and UTP. Many nucleoside diphosphates can act as acceptor, while many ribonucleoside triphosphates and de...
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http://www.encyclo.co.uk/local/20973
Type: Term Pronunciation: nū′klē-ō-sīd′ dī-fos′fāt kī′nās Definitions: 1. A phosphotransferase reversibly catalyzing the transfer of one phosphoryl group from ATP to a nucleoside diphosphate to yield a nucleoside triphosphate and ADP.
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http://www.medilexicon.com/medicaldictionary.php?t=61290
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