Video 3. Fluorescent live imaging of the posterior pole of a wildtype embryo transiently expressing GAP43-YFP.

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DOI: 10.7554/eLife.47346.009

Apical constrictions are visible at the center of the forming fold. Embryo was mounted with the posterior pole towards the objective and the resulting movie was digitally rotated. Maximum intensity projection of posterior view is shown as well as a transverse section along the dorsal/ventral midline. Ventral is to the bottom.