Proposed model for the flagellar rotary motor

The conclusions driven from the model are in agreement with the following experimental observations, denoting the flagellar rotation velocity as ω. (1) The torque is practically constant independent of ω from 0 to a critical value ωcr and then decreases sharply. (2) When ω is smaller than ωcr, the torque varies little with temperature. (3) The critical velocity ωcr shifts to lower speed at lower temperatures. (4) Where ω is larger than ωcr, declining of the torque steepens at lower temperatures. (5) When ω is smaller than ωcr, one revolution of the flagellar rotation consists of a constant number of steps. (6) When ω is smaller than ωcr, ω is proportional to the transmembrane potential difference. (7) The stator produces constant torque even when the stator is rotated relative to the rotor by external forces. (8) How the flagellar rotation velocity changes when the direction of the proton passage is reversed. (9) The motor has a switch that reverses the sense of the flagelllar rotation with the same absolute value of torque.