Video S6.

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Migrating control border cells marked with mCD8::GFP. Representative example of a live stage 9 control (slbo-GAL4, UAS-mCD8::GFP/+) egg chamber. The mCD8::GFP marker appears primarily cytoplasmic in migrating border cells but not in central polar cells because slbo-GAL4 does not drive expression in polar cells (Geisbrecht and Montell, 2002). Control border cells can extend several protrusions, but the forward protrusion is usually more stable (time in h:min). Frames were acquired every 3 min with a 20x objective. Anterior is to the left.