Appendix 1—figure 2. Fit of growth velocity data as a function of [AP] for β-actin-profilin one from Figure 2C using either the Michaelis-Menten approximation (5) with v_max and K_M as fit parameters (dashed blue) and its linear low-[AP] approximation (solid blue), the full result (3) with k₁, k_-1, k₂, and k_-2 as fit parameters (solid yellow) and with the additional constraint of detailed balance on the fit parameters (dotted green) and the low-[AP] approximations to these results (dashed yellow, solid green).