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Fig. 8. (a) Relative increase in the number of cells vs. time. The conditions are the same as those described for in Fig. 5. (b) Evolution of the cell density vs. time. Short term, the proliferation increases the cell density. After ~7 h, however, the migration becomes more important and the cell density decreases sharply.

Fig. 9. Histogram of the orientations of the divisions pictured in Fig. 5. No preferential angle is observed.

Fig. 10. Comparison of the behavior of wild-type cells (Upper) and HGF-producing autocrine cells (Lower). (Left) t = 90 min. (Right) t = 12 h. (Bar: 200 m m.)