Fig. 9. Cited2-null embryos have reduced cell density of the atrioventricular cushions. Hematoxylin and Eosin-stained sections of Cited2 wild-type (A,E) and null embryos (B-D,F-H) at 10 dpc. Sections were cut at a 45° angle (midway between frontal and transverse). (E-H) Higher magnifications of the boxed regions in A-D, showing the reduced cell density within the atrioventricular cushions in the Cited2-null hearts. Scale bar: 285 µm in A-D; 75 µm in E-H.