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Dielectric studies of ion fluctuation and chain bending in native DNA.

作者信息

Bone S, Small C A

机构信息

Institute of Molecular and Biomolecular Electronics, University of Wales, Bangor, Gwynedd, UK.

出版信息

Biochim Biophys Acta. 1995 Jan 2;1260(1):85-93. doi: 10.1016/0167-4781(94)00181-2.

DOI:10.1016/0167-4781(94)00181-2
PMID:7999800
Abstract

The high-frequency dielectric dispersion exhibited by solutions of native DNA is characterised as a function of electrolyte concentration, counterion type, temperature and pH. The data are interpreted in terms of counterion fluctuation along short segments (subunits) of the DNA chain. From calculation of the subunit length from dielectric relaxation time and increment, information is derived regarding the static and dynamic bending of the DNA chain. Activation enthalpies for the ion fluctuation process are obtained from temperature-dependent dielectric data.

摘要

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