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Collective Dynamics of Active Cytoskeletal Networks

Figure 3

Superdiffusivity in active actin networks.

Mean square displacements of two individual structures at 2 mM ATP show different but superdiffusive power law exponents (A). The distributions of the mean square displacement powerlaw exponents show maximal superdiffusivity at intermediate ATP concentrations (B, 50 (cyan) to 100 M (green); solid lines show gaussian fits). At low ATP concentrations (10 M, blue) the low activity of myosin-II limits the superdiffusive behavior. At high ATP concentrations (0.5 (yellow), 1 (red) or 2 mM (magenta)), myosin-II filaments are not able to exert high enough forces for constant network reorganization resulting in a lower mean superdiffusivity. Similarily, the highest mean run velocities are reached at intermediate ATP concentrations (C).

Figure 3

doi: https://doi.org/10.1371/journal.pone.0023798.g003