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Fig. 2. Distance traveled by cells under 0.5% agarose. At each time point (indicated in hours) the distance that the ten front-most cells in one field of view had traveled from the trough edge was determined. AX2 (wild type), ELC- (essential light chain mutant), ELC+ (essential light chain mutant rescued by expression of essential light chain cDNA), and mhcA- (myosin heavy chain null mutants).