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Twist simulations. (A) Finite-length MT system, at the beginning of the twist simulations. (B) Total angular displacement of the microtubule's terminal monomers in the simulations of the counterclockwise (solid line) and clockwise (dashed line) twist deformations, as seen from +z direction. The arrows indicate the moment when the twisting forces were set to zero and the structures were allowed to relax.
