Fig. 7. Angioblast migration in endodermless embryos. Transverse sections of endodermless embryos Tg(flk1:EGFP)^s843;cas mutants visualized for GFP (green), fibronectin (blue), and ß-catenin (red). The GFP (green) and fibronectin (blue) signals of the outlined areas are shown separately (A-E). The sections shown are at the level of the 6th (A,B), 10th (C), 14th (D) and 18th (E) somites. White arrow in A shows a cluster of angioblasts exiting the LPM. Despite the absence of endoderm, angioblasts migrate to the midline. NT, neural tube; NC, notochord; DA, dorsal aorta; PCV, posterior cardinal vein.