FIG. 1.

Time courses of T^T/N (solid), η^T (circles) and ${\mathit{\eta }}^{P_i}$ (triangles) obtained via stochastic simulation of 3 µM ATP actin polymerized from 10 nM ATP pentamers. Here, it is seen that T^T /N acheives only 70% of the steady-state η^T value while ${\mathit{\eta }}^{P_i}\approx 30\%$ at the steady state. Inset) The time course of η^D closely follows that of T^D /N.