Role of conformational entropy in force-induced bio-polymer unfolding

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dc.creatorKumar, Sanjay
dc.creatorJensen, Iwan
dc.creatorJacobsen, Jesper L.
dc.creatorGuttmann, Anthony J.
dc.date2007-02-19
dc.date.accessioned2026-07-07T07:47:27Z
dc.date.available2026-07-07T07:47:27Z
dc.descriptionA statistical mechanical description of flexible and semi-flexible polymer chains in a poor solvent is developed in the constant force and constant distance ensembles. We predict the existence of many intermediate states at low temperatures stabilized by the force. A unified response to pulling and compressing forces has been obtained in the constant distance ensemble. We show the signature of a cross-over length which increases linearly with the chain length. Below this cross-over length, the critical force of unfolding decreases with temperature, while above, it increases with temperature. For stiff chains, we report for the first time "saw-tooth" like behavior in the force-extension curves which has been seen earlier in the case of protein unfolding.
dc.description4 pages, 5 figures, ReVTeX4 style. Accepted in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0702436
dc.identifierhttp://arxiv.org/abs/cond-mat/0702436
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124173
dc.subjectSoft Condensed Matter
dc.subjectStatistical Mechanics
dc.titleRole of conformational entropy in force-induced bio-polymer unfolding
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