Appendix 1—figure 1. Illustration of the various sets defining a cell and its environment.

Grid sites occupied by cell $\alpha$, i.e. its domain ${𝒟}^{(\alpha )}$, are indicated in red colors. The cell’s membrane sites, ${ℬ}^{(\alpha )}$, are indicated by the lighter red color, the cell’s immediate neighborhood, ${𝒩}^{(\alpha )}$, is indicated in gray. Elementary events involving cell $\alpha$ always involve one grid site in ${ℬ}^{(\alpha )}$ and one grid site in ${𝒩}^{(\alpha )}$. For the hexagonal lattices used in this work, each grid site ${\mathbf{𝐱}}_k$ is surrounded by ${\displaystyle 6}$ nearest neighbors which we collectively denote by ${𝒩}_k$.