Pragya Srivastava, Roie Shlomovitz, Nir S. Gov, Madan Rao
We study the dynamics and patterning of polar contractile filaments on the surface of a cylindrical cell using active hydrodynamic equations that incorporate couplings between curvature and filament orientation. Cables and rings spontaneously emerge as steady state configurations of active filaments on the cylinder, and can be stationary or moving, helical or segments moving along helical trajectories. Contractility induces coalescence of proximal rings. We observe phase transitions in the steady state patterns upon changing cell diameter. Our results are relevant in a variety of cellular contexts involving the dynamics and patterning of active biopolymers in cylindrical cells.
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http://arxiv.org/abs/1206.2133
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