Movie 9

Cell protrusion formation of DN-Rac expressing mesoderm cells.
Image series of induced ppl progenitor cell aggregates isolated from a Tg(bAct:utro-mCherry) embryo and seeded on a fibronectin-coated substrate for 1.5 h. Upper panels display bright-field images and lower panels show fluorescent Utrophin-mCherry to label actin. Left panels are WT ppl cells and right panels are DN-Rac expressing ppl cells. Frame rate, ~ 6 fps; 2 min/frame. Scale bar, 10 μm.