Figure 7. Graphical representation of the measured angular direction of motility of R. capsulatus.

Cells were inoculated into the glass-agar interstice of square plates with a borosilicate insert, and incubated with incident white light. 0° indicates movement directly toward the light source, and ±180° indicate movement directly away from the light. Q₁, first quartile; Q₃, third quartile; IQR, interquartile range; n, total number of samples: (red) wild type strain B10; (purple) ctrA mutant strain BCKF; (green) flaA mutant strain bKSDF; (black) pooled B10, bKSDF, and BCKF strains with statistical analysis.