Fig. 2

Differential PRX1 expression caused morphological diversity between M1 and M3. a H&E staining of tooth germs in the sagittal plane showing the morphological differences between M1 and M3 during development. The dotted line marks the boundary between epithelium and mesenchyme. Scale bar: 100 μm. b Representative images and quantification of in-situ Prx1 expression at cap stage of M1 and M3. The dotted line marks the boundary between epithelium and mesenchyme. epi epithelium, mes mesenchyme. Scale bar: 100 μm. The error bar represents the standard deviation of the mean. **P < 0.01. c Representative images and quantification of in-situ Prx1 expression at late bell stage of M1 and M3. The dotted line marks the boundary between epithelium and mesenchyme. epi epithelium, mes mesenchyme. Scale bar: 100 μm. *P < 0.05