Figure 4

Histograms for the distance between heterocysts in the absence of nitrogen. A: wild type. does not follow a normal distribution. B: when patS expression is knocked-out. C: when hetR is over-expressed. All simulations were performed using 5000 random uniformly distributed binary initial conditions, restricted to biologically feasible conditions and considering D = = 0.767, for systems with 50–100 cells. For easier comparison frequencies were normalized to the number of cells.