E. Werner, F. Persson, F. Westerlund, J. O. Tegenfeldt, B. Mehlig
We study how the orientational correlations of DNA confined to a channel
depend on the channel diameter D by means of Monte-Carlo simulations and a
mean-field theory. We show how local correlations influence global properties
of the DNA. The correlations determine, for example, the dependence of the
end-to-end distance r_z of the DNA molecule upon D. We find that this
dependence is in general not of power-law form. We have experimentally measured
the extension of DNA in nanochannels. Tapered channels provide the necessary
resolution to study the dependence of the extension upon D. Experimental and
theoretical results are in qualitative agreement.
View original:
http://arxiv.org/abs/1201.2961
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