Fig. 8. The spatial expression pattern of Vegfa expression is not altered in Hhex^–/– embryos. (A) and (B) Low-power views of sagittal sections of E9.5 embryos stained with Hoecsht (blue staining of cell nuclei). Higher-power views of the areas boxed in (A) and (B) are shown as indicated. Green staining represents presence of Vegfa. In the heart of both Hhex^+/+ (C) and Hhex^–/– (D) embryos, Vegfa is expressed in both the myocardium and endocardium. Vegfa is also highly expressed in the developing gut endoderm of both Hhex^+/+ (E) and Hhex^–/– (F) embryos.