Figure 7.

A sealing zone encountering an edge parallel to the sealing-zone tangent. (a) Frames from a live-cell imaging sequence. Note that along the edge, the sealing-zone movement is stalled but around the edge, the movement is continuous. (b) An overlay of the 140 min movie in (a). The lines represent the kymographs in (c–e). (c–e) Kymograph of three lines: in the place where the ring is stalled (d) and on the two flanking regions (c,e). Note that the movement is stalled relative to the sides, but then the ring eventually crosses the barrier and the movement is resumed. The kymograph abscissa represents the time evolution of the movement.