Fig. 2
Cellular details of hedgehog epithelial expression and tooth germ morphogenesis. Ventral views, anterior to the left, of right-side tooth germs. DNA is stained in magenta. A–C: shha mRNA FISH (green) with expression visible in the inner dental epithelium (arrow) and nearby pharyngeal epithelium (asterisk). D–F: NF-κB:GFP reporter expression in both the inner (arrow) and outer dental epithelium (arrowhead). G–I: fli1:GFP expression in the dental papilla (arrow) and nearby nondental mesenchyme (asterisk). J–L: prdm1a:GFP expression in both the dental papilla (arrow) and in distal parts of the dental epithelium (arrowhead), with papilla expression appearing relatively higher at 48 hpf. Scale bar = 10 µm in L.