Fig. 10. Implantation of Fgf10-soaked beads into ext2/dak and extl3/box embryos. Dorsal (A-E) and lateral (A'-E'') views of 2.5-day-old embryos, anterior towards the left. Expression of genes indicated was examined by in situ hybridisation in operated left-hand side (A'-E') and unoperated right-hand side fin buds (A''-E'') dak fin buds. Implantation of Fgf10 protein-soaked beads into extl3/box also fails to rescue the expression of shh (E'). Yellow asterisks indicate position of implanted beads (A'-E'). LV, left view of embryo; RV, right view of same embryo.