Supplemental movie 3

Time-lapse movie of living wild-type cells. Cells were first cultivated at 26°C, and then shifted to 36°C in a microfluidic perfusion chamber with a continuous supply of EMM2 medium. Differential interference contrast (DIC) images were obtained at 15-min intervals and are shown at 8 frames / sec. The same cells are shown in Figure 2B (top).