Movie 2

Endogenous mesoderm cell internalization.
Confocal image series of endogenous ppl progenitor cells (green) internalizing at the dorsal germ ring margin in a Tg(-4gsc:eGFP-Hsa.HRAS) embryo injected with LynTagBFP mRNA to label the membrane of all cells (red) and fluorescent Dextran (blue) to label the interstitial fluid. Frame rate, ~ 2 fps; ~ 2.5 min/frame. Scale bar, 20 μm.