Appendix 5—figure 1. Simulation results.

(A) A representative cell trajectory as it engages in a simulated run. The total run interval, $\tau$, was split into 71 batches. The trajectory is not a straight-line owing to Brownian motion. (B) Two simulated reversals are indicated. Black and green segments indicate pusher ($v=v_o\left(1+a\right)$) and puller ($v=v_o$) modes, respectively. (C) Bacterial movements became purely diffusive over long times (~ 100 s) as indicated by the linear dependence of MSD on lag time $\tau$ (log-log plot). The value of the diffusion coefficient was calculated at these long times.