FIG. 7.

The probability of transition events between milestones that result in a decrease of the density of the cell is classified according to the location of the cell that acts as an acceptor to the transition. The top panel shows the probability of transitions to lateral cells (transitions between cells with the same value of z). The bottom panel displays the difference between the probability of transition to a neighboring cell with a larger value of z and a lower value of z. The error bars represent the values computed for the two layers.