Fig. 3. Kinematic analysis of shear flow induced cell motility. Cell motions were recorded under application of the indicated shear flow. Individual cell tracks are analysed as a set of instant velocity between successive time frames according to Eqn 2. (A) Probability distribution of speed modulus. The distribution of speed modulus was normalized so that the area under each curve is 1. (B) Angular distribution of cell instant velocities with respect to the flow axis. Directions of cell movement were decomposed into eight 45° classes, centered on the eight directions indicated.

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