Figure 1.

Frequency distributions of (a) run times; (b) run speed; (c) tumble times; and (d) tumble angles, for normal-size bacteria (length = 1.7 ± 0.1 µm, in blue) and an example subset of elongated bacteria (length = 10 ± 1 µm, in red). Dashed lines in a and c are the maximum likelihood estimations of exponential distributions. Dashed lines in b are the maximum likelihood estimations of lognormal distributions. Distributions are built from 5687 runs and 4156 tumbles from normal-size cells, and 1521 runs and 970 tumbles from elongated cells.