Fig. 4. Quantitative analysis of the role of Fas2, Dlg and Lgl in BC motility. Bar graphs show time of delamination (green) and migration (black) of BCs. Migration is faster when the level of Fas2, Dlg or Lgl is lower. These defects are rescued when Fas2 is targeted to PCs in Fas2 clusters using BA3-Gal4, or when Dlg is targeted to BCs in Fas2 or dlg clusters using Slbo-Gal4. Slower delamination of BCs correlates with the decrease of Fas2 polarity (see Fig. 6). Asterisks indicate statistically significant differences (General Linear Model analysis, P<0.05) from control (loss-of-function and misexpression experiments), or from Fas2 or dlg mutants (rescue experiments).