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Figure 3. Dmp1 null embryos and newborns appear grossly "normal". (A) Representative radiographs of the wild-type (+/+) and the knockout (-/-) embryos of day 15 are shown. (B,C) Alizarin red/Alcian blue staining of the wild-type (+/+) and the knockout (-/-) embryos of day 18 (B) and newborns (C) is shown.