Fig. 8. Implantation of Fgf10 soaked beads into fgf10/dae mutant fin buds. Dorsal (A-E) and lateral (A'-E'') views of 2.5-day-old embryos with anterior towards the left. Fgf10 protein rescues expression of fgf8 (A-A''), shh (B-B''), eng1a (C-C'') and wnt7a (D-D'') following bead implantation into the left-hand side fin bud (A'-D') when compared with unoperated right-hand side fin buds (A''-D''). Yellow asterisks mark position of implanted beads (A'-E'). As a control, implantation of beads soaked in PBS (E-E'') does not rescue marker gene expression. LV, left view of embryo; RV, right view of same embryo.