Figure 3. Representative sections of the explants of groups III (A,B), IV (C,D), and V (E, F) after subrenal culture for 2 wks. (A–B) Both experimental recombinants from group III (E13.5 diastemal epithelium + E13.5 molar mesenchyme) and control from group III (E13.5 molar epithelium + E13.5 molar mesenchyme) yielded molar teeth. (C) Experimental recombinants from group IV (E13.5 diastemal mesenchyme + E10.5 second branchial epithelium) gave rise to bone and keratinizing cysts without teeth. (D) Control from group IV (E13.5 molar mesenchyme + E10.5 second branchial epithelium) produced molar teeth. (E) Experimental recombinants from group V (E13.5 diastemal mesenchyme + E10.5 first branchial epithelium) developed into teeth. (F) Control from group V (E13.5 molar mesenchyme + E10.5 first branchial epithelium) resulted in teeth. (A–F) Azan dichromic staining. Scale bar: 200 µm.