The stall torque of the bacterial flagellar motor.

  title={The stall torque of the bacterial flagellar motor.},
  author={Markus Meister and Howard C. Berg},
  journal={Biophysical journal},
  volume={52 3},
The bacterial flagellar motor couples the flow of protons across the cytoplasmic membrane to the rotation of a helical flagellar filament. Using tethered cells, we have measured the stall torque required to block this rotation and compared it with the torque of the running motor over a wide range of values of proton-motive force and pH. The stall torque and the running torque vary identically: both appear to saturate at large values of the proton-motive force and both decrease at low or high pH… CONTINUE READING