Mechanics of bundled semiflexible polymer networks

Details Mechanics of bundled semiflexible polymer networks Mechanics of bundled semiflexible polymer networks

2006-11-29

arxiv.org/abs/cond-mat/0611752v2

Phys. Rev. Lett. 99, 088102 (2007)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 3 figures, final version as published

Scientific paper

10.1103/PhysRevLett.99.088102

While actin bundles are used by living cells for structural fortification, the microscopic origin of the elasticity of bundled networks is not understood. Here, we show that above a critical concentration of the actin binding protein fascin, a solution of actin filaments organizes into a pure network of bundles. While the elasticity of weakly crosslinked networks is dominated by the affine deformation of tubes, the network of bundles can be fully understood in terms of non-affine bending undulations.

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