Fig. 2. Expression of rat neural development markers (GAP43, MBP101, S100β) in tooth germ at different stages. (A, F) Neural development markers expression on E14.5, amplification times is 400×. (B, G) Expression of neural development markers on E16.5, amplification times is 400×. (C, H) Expression of neural development markers on E18.5, amplification times is 200×. (D, I) Expression of neural development markers at P1. (E, J) Expression of rat neural development markers in tooth germ on P7. DAPI in blue. S100: S100β, OE: outer enamel, EM: ectodermal mesenchyme, OEE: outer enamel epithelium, SR: stellate reticulum, IEE: inner enamel epithelium, DP: dental papilla, DF: dental follicle, SI: stratum intermedium, E: enamel, D: dentin, P: dental pulp. *Co-stained.