Nature3y
Gross morphological characterization, whole-mount immunohistochemistry and lacZ staining of HIF-1a null embryos obtained from heterozygous crosses
(B) Yolk sacs from E9.5 littermates, displaying a substantial size difference. The HIF-1 null yolk sac shows disorganized vascularization compared with the wild-type. (C) E8.5 littermates stained ...