mortality/aging
• embryonic lethality occurs due to early developmental problems
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cellular
• when exposed to hydrogen peroxide mouse embryonic fibroblasts (MEFs) exhibit a 20% to 50% survival rate compared to a 70% to 100% survival rate for wild-type MEFs
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• when treated with etoposide, mouse embryonic fibroblasts (MEFs) undergo a 2-fold increase in apoptosis compared to wild-type MEFs
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