Model parameters (Possibility 1).

aUsing a slightly larger number than 1800 For3p/cell [4] to obtain realistic numbers of For3p dimers per cable tip (see Fig. 3A).
bFrom published images [4], [27], [9].
cEstimate, using a value smaller than to account for the larger size of For3p compared to actin monomers.
dValue reproducing measured cable flow rates.
eA fraction is required for the density of For3p dots along actin cables in the simulations to be consistent with experiment (Fig. 1A). Using , our estimate (see Fig. 2A), and in Eq. 5, we estimate which corresponds to .
fValue reproducing actin cable lengths and density profiles along actin cables that are consistent with experiment [8], [4]. For3p disassembly rates are identical to those of actin.
gValue for which the analytical model and the computational model with age-independent disassembly give identical results in the limit of fast cytoplasmic diffusion coefficients.
hValue required to obtain a density of For3p dots along actin cables consistent with experiment, corresponding to . Consistently with this, using the values of the table in Eq. 4, the bounds of Fig. 2A require .