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. Author manuscript; available in PMC: 2010 Feb 27.
Published in final edited form as: Science. 2009 Feb 27;323(5918):1232–1234. doi: 10.1126/science.1167418

Fig. 4.

Fig. 4

(A–C) Frontal sections through the first molar tooth germs (arrows) of E18.5 wildtype (A), Msx−/− (B), and Msx1−/−Osr2−/− (C) embryos. (D–I) Bmp4 mRNA expression in the first molar tooth mesenchyme (arrows) in wildtype (D, G), Msx1−/− (E, H), and Msx1−/−Osr2−/− (F, I) embryos at E13.5 (D–F) and E14.5 (G-I). (J–L) Lef1 mRNA expression in the first molar tooth mesenchyme (arrows) in E15 wildtype (J), Msx1−/− (K), and Msx1−/−Osr2−/− (L) littermates. ps, palatal shelf; to, tongue. Scale bar, 200 µm.