Movie 4, related to Figure 7, S8.

Reduction of basal surface area is visible at the surface of stage 10B egg chambers undergoing centripetal migration. A series of two time-lapse Movies consisting of the data from Fig. S7A-F of stage 10B egg chambers undergoing centripetal migration as viewed from the surface. Egg chambers are labeled with Sqh-mCherry (white) and clonally express luciferase (part 1) or shg UAS-regulated RNAi transgenes (part 2) via the Flipout-Gal4 system (magenta). In video #1, the anterior-most centripetal FCs expressing luciferase UAS-regulated RNAi transgenes reduced their basal surface area at the surface of the egg chamber at a rate comparable to neighboring cells, whereas in video #2 columnar FCs expressing shg UAS-regulated RNAi transgenes appeared to be delayed in this process. Full genotypes for this Movie are available in Table S2. Scale bars 10μm.