Figure 1A in Mittal, N, E.O. Budrene M. P. Brenner, and A. van oudenaarden Motility of Escherichia coli cells in clusters formed by chemotactic aggregation. "Proc Nat/ Acad SciUSA 100,no.23(NoV11,2003):13259-63 Copyright(2003)National Academy of Sciences, U.S.A100, no. 23 (Nov 11, 2003): 13259-63. Copyright (2003) National Academy of Sciences, U. S. A. Figure 1A in Mittal, N., E. O. Budrene, M. P. Brenner, and A. Van Oudenaarden. "Motility of Escherichia coli cells in clusters formed by chemotactic aggregation." Proc Natl Acad Sci U S A