Erythropoiesis in E15.5 V205GR and ΔNFR embryos. Macroscopic appearance (panels A-C) of wild-type (panels A, D, G), V205GR (panels B, E, H), and ΔNFR (panels C, F, I) embryos are shown along with hematoxylin and eosin staining of embryonic liver (panels D-F), and circulating erythrocytes observed in large blood vessels (panels G-H). Scale bars correspond to 20 μm.