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Fig. 2. Notch pathway mutations and arteriovenous malformations. (A)
In a wild-type mouse embryo, India ink injected into the heart in order to
visualize blood flow exits through the aortic arch arteries and enters the
descending dorsal aorta. (B) In an embryo with an endothelial
cell-specific deletion of the Notch1 gene, the injected ink leaks
directly into the venous system via arteriovenous malformations. Images
courtesy of Luke Krebs and Tom Gridley.