Unzipping DNA by force: thermodynamics and finite size behaviour

Details Unzipping DNA by force: thermodynamics and finite size behaviour Unzipping DNA by force: thermodynamics and finite size behaviour

2005-11-22

arxiv.org/abs/cond-mat/0511531v1

J. Phys.: Condens. Matter 18 (2006) S215-S223

Physics

Condensed Matter

Soft Condensed Matter

10 pages, accepted for publication in special issue of Journal of Physics: Condensed Matter

Scientific paper

10.1088/0953-8984/18/14/S06

We discuss the thermodynamic behaviour near the force induced unzipping transition of a double stranded DNA in two different ensembles. The Y-fork is identified as the coexisting phases in the fixed distance ensemble. From finite size scaling of thermodynamic quantities like the extensibility, the length of the unzipped segment of a Y-fork, the phase diagram can be recovered. We suggest that such procedures could be used to obtain the thermodynamic phase diagram from experiments on finite length DNA.

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