mortality/aging
• no homozygotes are detected after birth, with lethality after E9.5 as only debris is recovered from decidua at this time
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embryo
• at E6.5, the core of the embryos consist of an abnormal, unstructured mass of irregular cells and embryos do not show a distinct ectodermal epithelial layer, proamniotic cavity, chorion, or amnion
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• embryos show growth retardation at and after E7.5 with little growth or development at E8.5
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• inner cell mass fails to form a normal primitive ectoderm
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growth/size/body
• embryos show growth retardation at and after E7.5 with little growth or development at E8.5
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