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Nucleic Acids Research, 1977, Vol. 4, No. 2 397-403
© 1977

Articles

A 31P - NMR study of the interaction of Mg2+ ions with nucleoside diphosphates

S. Tran-Dinh and J.M. Neumann

Département de Biologie - Centre d'Etudes Nucléaires de Saclay - BP No2 - 91190-Gif-sur-Yvette France

Received November 29, 1976. interaction of Mg22+ with nucleoside disphospha-tes : ADP, GDP, CDP and UDP has been studied by phosphorus magnetic resonance spectroscopy in aqueous solution. The results show that these four nucleotides behave similarly, the Mg2+ ion binds to the {alpha} but not to the ß phosphate moiety. The strength of the interaction of Mg2+ ions with nucleoside diphosphates is weaker than with nucleoside triphosphates. The association of Mg2+ on the phosphate chain is stronger in a neutral than in an acid medium.


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