FIGURE 1.

Disk displacement as function of time for three values of the bending stiffness of filaments, K_B = 1000 (dotted), 100 (solid), and 0 (dashed). The vertical dashed lines show the times corresponding to snapshots I–III, namely 70 μs, 700 μs, and 2100 μs, respectively, after the simulation started with monomers and 5% dimers distributed randomly. (Snapshots) Green spheres are monomers in filaments, red spheres are monomers tagged by Arp2/3 for branching, and blue spheres are the pointed ends of filaments. G-actin monomers are not shown. The disk is purple. The black box in each frame marks the boundary of the periodic box.