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EphA receptor genes are expressed in the fusing secondary palate. Expression of (A, F, K) EphA1, (B, G, L) EphA2 is not present in the MES and MEE. (C, H, M) EphA3, (D, I, N) EphA4, and (E, J, O) EphA7 are expressed in the mesenchyme of the fusing palate at E14.5 but distinctly missing from the MES and MEE. MES, midline epithelial seam; PS, palatal shelves. Scale bar = 100μm.
