Movie S1

FRAP analysis of Fascin[WT]-GFP in control bristles at 40 h APF.
FRAP analysis of Fascin[WT]-GFP-expressing control bristles at 40 h APF. Fascin[WT]-GFP fluorescence recovered rapidly after photobleaching, suggesting that Fascin dynamically exchanges in the actin bundles. Images were acquired at 3 s intervals for 5 min, with 3 z-sections at 1.5 µm intervals.