mortality/aging
• median age of death is 11 months
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behavior/neurological
• mutants lose the ability to escape a tail suspension by climbing onto the observer's hand
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• reduced nocturnal activity; mutants roam only 25% of the 2 minute periods during 12 hour dark cycles compared to 50% in wild-type mice
• inactivity in open cage
• age of onset was approximately 1 month later than observed in Hprttm2Detl mutant mice
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nervous system
• neuronal intranuclear inclusions evident
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