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. Author manuscript; available in PMC: 2014 Aug 3.
Published in final edited form as: Phys Rev Lett. 2010 Apr 22;104(16):168102. doi: 10.1103/PhysRevLett.104.168102

FIG. 2.

FIG. 2

(a) Motion of individual bacteria during a single 7.5-s video recording. Red indicates motion toward the inoculation port (to the left of the figure), and a circle denotes the starting point of the recorded motion. (b) Average vector field of the cells’ motion. The red lines represent vectors pointing to the left, and black lines to the right.