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¡¡¡¡Ceacam1 deficiency causes partial cleft secondary palate.
¡¡¡¡At E15.5, palatal fusion was well under way in the anterior, middle¡¡and¡¡posterior regions of palatal shelves in the wild-type embryo. There was no epithelial component at the midline of the palate (A, C, E). The Ceacam1 mutant embryo shows the MES in the area of palatal fusion (arrow) (B, D, F). Cytokeratin staining supported the existence of the MES, indicating a delay of palatal fusion (G, H). PS, palatal Shelf; T, tongue; tb, tooth bud. Scale bar, 200 µm (A–F), 50 µm (G, H).
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