Figure 5: Frequencies of trajectory shapes in the three strains assessed by the trajectory index (TRAIN) values, which tend to be low in irregular trajectories, middle in circular trajectories, and high in linear trajectories.

(a) Non-corrected TRAIN values. (b) TRAIN values corrected with the trend line equations (cf. Fig. 6) to carry all durations to 6 s (see text for details). Standard deviations: for wild-type, non-corrected: 0.42; corrected: 0.41. For ΔlafA, non-corrected: 0.59; corrected: 0.57. For ΔfliC, non-corrected: 0.57; corrected: 0.53.