Rapid rotation of flagellar bundles in swimming bacteria

  title={Rapid rotation of flagellar bundles in swimming bacteria},
  author={Graeme Lowe and Markus Meister and Howard C. Berg},
A bacterial flagellum is driven by a reversible rotary motor1–3. The power input is determined by protonmotive force and proton flux, the power output by torque and speed: interrelationships between these parameters provide important clues to motor mechanisms. Here we describe the relationship between torque and speed at constant protonmotive force. The measurements are analogous to those that could be made by plugging an electric motor into a constant-voltage outlet, varying the external load… CONTINUE READING

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