Figure 2. PtoDC3000: cheA2− strains are deficient in chemotactic swimming motility.
(A) Example pictures and box plots of the colony diameter two days after inoculation of the indicated strains on 0.28% agar KB swim plates. (B) The ratio of colony forming units of the indicated bacteria that entered a capillary tube of KB media over a capillary tube of 10 mM MgSO4 in the split capillary assay. Asterisks indicate statistical significance compared to wild type in a Student’s t-test at the indicated p-values. Data represent the average of eight replicates and error bars are the standard error. Essentially identical results were obtained in at least three independent experiments for all strains.