Before revision:  Recently, it has been shown that the number of engaged torque-generating 'stator ' units in the motor varies depending on the external load the motor experiences , and suggested that mechanosensing in the flagellar motor is driven via a 'catch bond' mechanism in the motor's stator units.
After revision:  Recently, it has been shown that the number of engaged torque-generating 'stator ' units in the motor depends on the external load the motor experiences , and suggested that mechanosensing in the flagellar motor is driven via a 'catch bond' mechanism in the motor's stator units.