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- W2037887680 abstract "Flagellated bacteria swim by rotating helical filaments driven by motors embedded in the cell wall and cytoplasmic membrane. A model is proposed to explain the mechanism of the motor. The protons passing through the channels induce a strong electric field in Mot molecules. This field originates an impulse force to cause the flagellar rotation if the following conditions are fulfilled: (a) Mot molecules have a spontaneous electric polarization. (b) The lipid bilayers are viscoelastic. (c) There is a delay of deformation in response to stress in Mot molecules. 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." @default.
- W2037887680 created "2016-06-24" @default.
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- W2037887680 date "2005-11-01" @default.
- W2037887680 modified "2023-09-25" @default.
- W2037887680 title "Proposed model for the flagellar rotary motor" @default.
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- W2037887680 doi "https://doi.org/10.1016/j.colsurfb.2005.07.011" @default.
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