Movie 1, related to Fig. 7.

Analysis of cell vertex movement inside and outside the salivary gland placode boundary. Time lapse movie of a sqhGPF; Ubi-RFP embryo, ExpID0357, (myosin highlighted by SqhGFP and cell membranes by Ubi-RFP) showing the salivary gland placode and surrounding epidermal cells starting from late stage 10 onwards. Time interval between frames is 1min:30sec. The first and last frame highlight the position of vertices analysed in Figure 7.