Force-induced conformational transition in a system of interacting stiff polymers: application to unfolding

Kumar, Sanjay ; Giri, Debaprasad (2005) Force-induced conformational transition in a system of interacting stiff polymers: application to unfolding Physical Review E: covering statistical, nonlinear, biological, and soft matter physics, 72 (5). Article ID 052901. ISSN 2470-0045

Full text not available from this repository.

Official URL: http://journals.aps.org/pre/abstract/10.1103/PhysR...

Related URL: http://dx.doi.org/10.1103/PhysRevE.72.052901

Abstract

We consider a stiff polymer chain in poor solvent and apply a force at one end of the chain. We find that by varying the stiffness parameter, the polymer undergoes a transition from the globule state to the foldedlike state. The conformation of the folded state mimics the β sheet as seen in the titin molecule. Using the exact enumeration technique, we study the extension-force and force-temperature diagrams of such a system. The force-temperature diagram shows the re-entrance behavior for a flexible chain. However, for a stiff chain this re-entrance behavior is absent and there is an enhancement in θ temperature with the rise of stiffness. We further propose that the internal information about the frozen structure of a polymer can be read from the distribution of end-to-end distance which shows a sawtoothlike behavior.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:102711
Deposited On:02 Feb 2018 04:23
Last Modified:02 Feb 2018 04:23

Repository Staff Only: item control page