Elasticity of Stiff Biopolymers

Details Elasticity of Stiff Biopolymers Elasticity of Stiff Biopolymers

2007-10-08

arxiv.org/abs/0710.1465v1

Physical Review E, 76, 061801 (2007)

Physics

Condensed Matter

Soft Condensed Matter

Submitted for publication, five pages, three figures

Scientific paper

10.1103/PhysRevE.76.061801

We present a statistical mechanical study of stiff polymers, motivated by experiments on actin filaments and the considerable current interest in polymer networks. We obtain simple, approximate analytical forms for the force-extension relations and compare these with numerical treatments. We note the important role of boundary conditions in determining force-extension relations. The theoretical predictions presented here can be tested against single molecule experiments on neurofilaments and cytoskeletal filaments like actin and microtubules. Our work is motivated by the buckling of the cytoskeleton of a cell under compression, a phenomenon of interest to biology.

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