Skip to main content
. 2007 Apr 6;93(1):294–302. doi: 10.1529/biophysj.106.095265

FIGURE 4.

FIGURE 4

The speed of chimeric flagellar motors. (A) A histogram of all speeds recorded from 50 different motors driving 1-μm diameter beads at pH 7 and [Na+]ex = 85 mM. (B) Average speed/stator unit with 1-μm beads versus pHex for different [Na+]ex. (C) Speed versus SMF for the data in B. (D) Histogram of speeds from 25 motors driving 0.35-μm diameter beads at pH 7 and [Na+]ex = 85 mM. (E) Average speed of the first stator unit with 0.35-μm beads, versus pHex for different [Na+]ex. (F) Speed versus SMF for the data in E. Also shown in C and F are linear fits constrained to the origin for data at 1 mM (dashed lines), 10 mM (dotted lines), and 85 mM (solid lines) [Na+]ex. Fitted gradients for 1 mM, 10 mM, and 85 mM [Na+]ex, respectively, are −0.045 ± 0.001 Hz/stator/mV, −0.045 ± 0.002 Hz/stator/mV and −0.046 ± 0.001 Hz/stator/mV in C, and −0.23 ± 0.01 Hz/stator/mV, −0.32 ± 0.003 Hz/stator/mV, and −0.36 ± 0.005 Hz/stator/mV in F.