Fig. 3

Histology and gene expression in developing teeth of Xenopus tropicalis. Longitudinal sections of the X.t. upper jaw at the NF57 developmental stages were stained with HES (a, g) or processed by in situ hybridization for the indicated genes (b-f and h-l). Ameloblasts and odontoblasts are delineated by black dotted lines or by an orange line, respectively. The asterisks locate the mineralized matrix. The scale bars in (a) and (g) respectively represent 20 μm in (a-f) and (g-l)