Mechanics of bundled semiflexible polymer networks |
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Authors: | Lieleg O Claessens M M A E Heussinger C Frey E Bausch A R |
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Affiliation: | Lehrstuhl für Biophysik E22, Technische Universit?t München, James-Franck-Strasse 1, 85748, Garching, Germany. |
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Abstract: | 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 cross-linked networks is dominated by the affine deformation of tubes, the network of bundles can be fully understood in terms of nonaffine bending undulations. |
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