mortality/aging
• E7.5 embryos exhibit a loss of structural integrity, but are intact at E6.5
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embryo
• E6.5 embryos lack an anterior visceral endoderm (AVE)
• however, the primitive endoderm (PrE) and epiblast are normal in E4.5 embryos
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• E5.5 embryos fail to specify a distal visceral endoderm (DVE)
• however, the primitive endoderm (PrE) and epiblast are normal in E4.5 embryos
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