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Fig. 2. Endothelial deletion of β1 integrins causes EC
disorganization leading to cardiovascular defects and lethality at
midgestation. Whole-mount anti-CD31 immunostained mouse yolk sacs at the
indicated embryonic stages. The left panels of each e9.0 are capillary regions
and the right panels are regions apparently undergoing arteriovenous
remodeling. Note the disconnected capillaries and overall vascular
disorganization in all mutants. Images are representative of at least five
control/mutant embryo pairs at each stage. Scale bars: 100 µm for e9.5 and
50 µm for e9.0 and e10.5 Tie2-Cre; 25 µm for
Tie1-Cre.