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MORN5 expression in the fusion region at stage 29. (A–C) Frontal sections of chicken head showed strong expression in the maxilla and in the area where edges of the maxillary prominences grow together with medial nasal prominence. (D–F) Horizontal sections of chicken head. (E) Region of fusion had prominent MORN5 expression. (F) More caudal section (other sample). Scale bars = 100 μm.
