Competitive substitution of hexammine cobalt(III) for Na+ and K+ ions in oriented DNA fibers.

@article{Korolev2001CompetitiveSO,
  title={Competitive substitution of hexammine cobalt(III) for Na+ and K+ ions in oriented DNA fibers.},
  author={Nikolay Korolev and Alexander P Lyubartsev and Allan Rupprecht and Lars Nordenski{\"o}ld},
  journal={Biopolymers},
  year={2001},
  volume={58 3},
  pages={268-78}
}
Competition of the trivalent cation, Co(NH3)(3+)(6), with K+ and Na+ ions in binding to DNA was studied by equilibrating oriented DNA fibers with ethanol/water solutions (65 and 52% v/v EtOH), containing different combinations and concentrations of KCl and NaCl and constant concentration (0.8 mM) of Co(NH3)(6)Cl(3). The degree of Co(NH3)(3+)(6) binding to DNA does not depend significantly on the ethanol concentration or on the kind of univalent cation (Na+ or K+). The ion exchange selectivity… CONTINUE READING
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