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A potassium-39 NMR study of potassium binding to double-helical DNA.

作者信息

Braunlin W H, Nordenskiöld L

出版信息

Eur J Biochem. 1984 Jul 2;142(1):133-7. doi: 10.1111/j.1432-1033.1984.tb08260.x.

DOI:10.1111/j.1432-1033.1984.tb08260.x
PMID:6745263
Abstract

The binding of K+ to double-helical DNA has been examined by 39K NMR. The results obtained are in substantial agreement with previous measurements of 23Na+ binding to DNA. Thus, in both cases the fractional neutralization of DNA phosphate charge appears independent of the total univalent cation concentration. Further, the dependences of the 23Na+ and 39K+ linewidths on Mg2+ and on temperature are strikingly similar. The implications of these results are discussed in terms of current theories of counterion binding to cylindrical polyelectrolytes.

摘要

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