Fig. 2. Behavior of cells entering and leaving acetate. Cells were analyzed using Motion Analysis as they entered 5 mmol l^-1 acetate in buffer from a control buffer or vice versa. Cells were monitored for turns (% change in direction, PDC) and speed. (A) Cell turning upon entering acetate (On PDC); (B) cell turning upon leaving acetate (Off PDC); (C) speed in mm s^-1 upon entering acetate (On speed). (A) Wild-type, Cam 11 and XntA On PDCs were significantly different from Controls. (B) Wild type and Cam 11 Off PDCs were significantly different from Controls. (C) Wild-type and Cam 11 speeds were significantly different from control (Mann-Whitney U-test, P<0.05). The wild-type and XntA cells were analyzed in Na-acetate; Cam 1-1 and Cam 11 were analyzed in K-acetate. (Values are means ± 1 s.e.m. of 45 or more measurements.)