Myosin dynamics in NBs ingressing as clusters of cells in a Delta-RNAi embryo. Time-lapse video of a Delta-RNAi embryo showing a cluster of ingressing NBs (encircled in white in the first time frame). Myosin is labeled in green (Sqh::GFP), and the cell membranes are labeled in red (GAP43::mCherry). Notice that myosin accumulates in persistent puncta as multiple cells attempt to ingress together. After a “tug of war” between cells, their apically constricted membranes snap back and disrupt collective ingression. Video is displayed at 20 frames per second.
