mortality/aging
• homozygotes are viable, fertile and macroscopically normal up to at least 12 months of age, but show increased sensitivity to mitomycin C (MMC)-induced lethality
• in females, MMC injections of 10 and 15 mg/kg of body weight result in enhanced sensitivity; a shorter latency is observed with 15 mg/kg
• in males, 7.5 mg/kg is lethal for 30% of homozygotes, while all heterozygotes survive; at 10 mg/kg, only 10% of homozygotes survive treatment, versus 70% of heterozygotes
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cellular
• homozygous null ES cells are viable but are ~2-fold more sensitive to mitomycin C than wild-type
• notably, mutant ES cells are not significantly sensitive to other DNA interstrand cross-linking agents, UV (254 nm), methyl methanesulfonate, or gamma rays
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homeostasis/metabolism
• homozygotes are viable, fertile and macroscopically normal up to at least 12 months of age, but show increased sensitivity to mitomycin C (MMC)-induced lethality
• in females, MMC injections of 10 and 15 mg/kg of body weight result in enhanced sensitivity; a shorter latency is observed with 15 mg/kg
• in males, 7.5 mg/kg is lethal for 30% of homozygotes, while all heterozygotes survive; at 10 mg/kg, only 10% of homozygotes survive treatment, versus 70% of heterozygotes
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