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Figure 6: Scanning electron microscopy of wild-type, heterozygous, and enamelin null mouse enamel from incisors and molars at 7 weeks. SEM was used to examine fractured sections of mouse incisors (a–d) and molars (e–h). The enamel of wild type (a and e) and heterozygous (b and f) both showed a thick enamel layer with well-defined rod (prism) structures. In contrast, the enamel of Enam null mice (c, d, g, and h) was extremely thin and irregular, with a rough surface. In some places (g), the enamel did not even form sufficiently to complete the DEJ. Arrowheads delineate the DEJ. This figure was originally published in: Hu et al. J. Biol. Chem. 283 (16):10858-10871, 2008 by The American Society for Biochemistry and Molecular Biology. DOI/ 10.1074/jbc.M710565200.