Segment boundary formation in Drosophila embryos.

  title={Segment boundary formation in Drosophila embryos.},
  author={Camilla W. Larsen and Elizabeth MA Hirst and Cyrille Alexandre and J. Oswald Vincent},
  volume={130 23},
In Drosophila embryos, segment boundaries form at the posterior edge of each stripe of engrailed expression. We have used an HRP-CD2 transgene to follow by transmission electron microscopy the cell shape changes that accompany boundary formation. The first change is a loosening of cell contact at the apical side of cells on either side of the incipient boundary. Then, the engrailed-expressing cells flanking the boundary undergo apical constriction, move inwards and adopt a bottle morphology… CONTINUE READING


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