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Fig. 8. Summary histogram of the effects of calcium transient frequency on cell speed. In cells that are less adhesive transient frequency has no significant effect on the average 90th percentile traction stress (dark bar) or cell speed (stippled bar). By contrast, transient frequency is associated with a significant increase in average 90th percentile traction stress and cell speed in cells that are more adhesive. * indicates a significant difference (P<0.05) from all other measures of cell speed. # indicates a significant difference (P<0.05) between these two measures only.