Movie 2

Cell rearrangements during Drosophila axis elongation. Wild-type embryo expressing Spider:GFP. Time indicated in min:s, images acquired every 15 s. Anterior left, ventral down. Cells that lost neighbors were highlighted starting at t = 0 (the onset of elongation in stage 7). Purple, no neighbors lost. Blue, one neighbor lost. Green, two neighbors lost. Yellow, three neighbors lost. Red, four neighbors lost.