mortality/aging
• homozygotes die within a few days of birth
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cellular
• MEFs obtained at E13.5
• at early passages show improved growth rates and higher cell densities
• enter more quickly into S phase
• higher apoptosis levels in culture 24 hours after serum withdrawl
• faster development of immortalized cell lines
• MEFs infected with c-Myc and H-Ras viruses develop higher numbers of transformed foci
• transformed cells capable of anchorage independent growth
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embryo
• apparent by E13.5
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growth/size/body
• apparent by E13.5
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