Video 3. Time-lapse images of a wild-type embryo carrying btl>UtrGFP visualised from a lateral view.

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DOI: 10.7554/eLife.09373.013

Note the accumulation of F-actin at the apical surface leading to the polymerisation of F-actin bundles in the form of rings at the end of the movie.

DOI: http://dx.doi.org/10.7554/eLife.09373.013