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Fig. 3. Histological sections of Dvl2+/- and Dvl2-/- 18.5 dpc embryos stained with Hematoxylin and Eosin. (A) In the wild type, the right and left ventricle is divided by a membranous septum. (B) DORV and (C) transposition of the great arteries (TGA) in Dvl2-/- mutant. In B, the arrow indicates the pulmonary artery. Ao, aorta; PA, pulmonary artery; RV, right ventricle; LV, left ventricle.