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Interaction of divalent metal ions with DNA investigated by <SUP>23</SUP>Na NMR relaxation
- Source :
- Physical Chemistry Chemical Physics (PCCP); May 21, 2000, Vol. 2 Issue: 10 p2425-2428, 4p
- Publication Year :
- 2000
-
Abstract
- The interaction between Na-DNA and divalent metal cations (Mg<SUP>2+</SUP>, Mn<SUP>2+</SUP>, Co<SUP>2+</SUP> and Ni<SUP>2+</SUP>) has been investigated by <SUP>23</SUP>Na NMR relaxation. The experimental data have been interpreted in terms of Manning's counterion condensation theory and a two-site exchange for the sodium ions. The experiments showed that Mn<SUP>2+</SUP> affects the polyion surface atmosphere in a different way from the other metal ions. This behaviour may be due to sugar puckering transition of the DNA induced by Mn<SUP>2+</SUP>.
Details
- Language :
- English
- ISSN :
- 14639076 and 14639084
- Volume :
- 2
- Issue :
- 10
- Database :
- Supplemental Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Periodical
- Accession number :
- ejs1715713