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. Author manuscript; available in PMC: 2017 Jul 20.
Published in final edited form as: Rep Prog Phys. 2017 Jan 27;80(3):036601. doi: 10.1088/1361-6633/aa5282

Figure 3.

Figure 3

Actin cytoskeletal network behaves as a viscoelastic fluid, primarily due to force-dependent binding and unbinding of cross-linker proteins and filament depolymerization. When forces are applied to filaments, cross-linker dynamics acts as a viscous friction between filaments at time scales longer than cross-linker binding rates. The network flows under force, giving a constitutive relationship as in equation (6).