Movie 2.

Mechanical tension is generated autonomously for each cell. Time-lapse movie of histoblasts in the pupal abdominal epidermis immediately before laser cut and after first and second laser cuts. Times relative to the first laser cut are shown. Adherens junctions are labelled by E-cadherin-GFP and the posterior compartment is identified by expression of engrailed-Venus (a marker of the posterior compartment). Red dots mark ends of ablated cell junctions. Scale bar is 10 μm.