Fig. 3.

Schematic of the model. The states between the two pink dashed lines contribute to the $N$th ABP binding. Arrows link states between which transitions are allowed. $k_{ij}^{f,m}$ and $k_{ij}^{b,m}$ are the forward and backward rates, where $i$ and $j$ are the types of the last two ABPs at the tip and $*$ represents a half-bound state. The rates used in the KMC simulations and in the master equation are compared in SI Appendix, Table S1.