Figure 2.
TAB2 Expression in Human Embryonic Hearts
(A) Section of a 5.5 wk embryo. TAB2 expression (brown color) is prominent in the ventricular trabeculae and in the endocardial cushions of the outflow tract.
(B) Magnification of endocardial cushions.
(C) Frontal section of a 7.5 wk embryo.
(D) Magnification showing cytoplasmic expression of TAB2 in the endothelial cells lining the developing aortic valves.
Abbreviations are as follows: At, atrium; Ao, aorta; EC, endocardial cushions; Tr, trabeculae; Ve, ventricle.