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http://hdl.handle.net/2289/3620
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DC Field | Value | Language |
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dc.contributor.author | Sinha, Supurna | - |
dc.date.accessioned | 2008-07-31T10:30:07Z | - |
dc.date.available | 2008-07-31T10:30:07Z | - |
dc.date.issued | 2008-06 | - |
dc.identifier.citation | Physical Review E, 2008, Vol.77, 061903 | en |
dc.identifier.issn | E-ISSN: 1550-2376 | - |
dc.identifier.issn | P-ISSN: 1539-3755 | - |
dc.identifier.uri | http://hdl.handle.net/2289/3620 | - |
dc.description | Open Access | en |
dc.description.abstract | We investigate the role of fluctuations in single-molecule measurements of torque-link (t-lk) curves. For semiflexible polymers of finite persistence length (i.e., polymers with contour length L comparable to the persistence length LP), the torque versus link curve in the constant-torque (isotorque) ensemble is distinct from the one in the constant-link (isolink) ensemble. Thus, one encounters the conceptually interesting issue of a “free energy of transition†in switching ensembles while making torque-link measurements. We predict the dependence on the semiflexibility parameter beta=L/LP of this extra contribution to the free energy, which shows up as an area in the torque-link plane. This can be tested against future torque-link experiments with single biopolymers. We bring out the inequivalence of torque-link curves for a stiff polymer and present explicit analytical expressions for the distinct torque-link relations in the two ensembles and the free-energy difference in switching ensembles in this context. The predictions of our work can be tested against single-molecule experiments on torsionally constrained biopolymers. | en |
dc.format.extent | 88284 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | en |
dc.publisher | American Physical Society | en |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevE.77.061903 | en |
dc.relation.uri | http://arxiv.org/abs/0805.2458 | en |
dc.rights | 2008 The American Physical Society | en |
dc.title | Free energy of twisted semiflexible polymers | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (TP) |
Files in This Item:
File | Description | Size | Format | |
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2008 PRE V77 061903.pdf | Open Access | 86.21 kB | Adobe PDF | View/Open |
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