Complexes of DNA with trivalent metal ions in presence of manganese ions |
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| Authors: | Kas'ianenko N A Plotnikova L V Zanina A V Anderzhanov A Sh Defrenne S |
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| Institution: | Physical Department, St. Petersburg State University, Ul'yanovskaya ul. 1, Petrodvorets, 198904 Russia. |
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| Abstract: | The interaction of DNA with Fe3+, Al3+, Co(NH3)6(3+) in a solution containing MnCl2 was studied. It was shown that there exists a competition for the binding sites between Mn2+ and Al3+, while the binding of Mn2+ to DNA does not depend on the presence of Fe3+ and Co(NH3)6(3+) in solution. We proposed that Fe3+ and Co(NH3)6(3+) ions prefer to bind to phosphates, and Al3+ ions are capable to bind to the nitrogen bases of DNA. |
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