behavior/neurological
• male mutant mice do not show adaptation to stress with repeated restraint, in contrast to wild-type controls
• neither male or female mutant mice show a corticosterone response to 2-hour cold exposure
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homeostasis/metabolism
• unlike wild-type animals, males and females do not show any corticosterone response to cold exposure
• males show no corticosterone response to cold exposure when they are subjected to repeated restraint, in contrast to response to restraint alone; female mutants show significant corticosterone response after repeated restraint
• male and female mutant mice have similar basal corticosterone levels, whereas wild-type males show higher levels than females
• neither male or female mutant mice show a corticosterone response to 2-hour cold exposure
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• basal level in blood of males is higher (188.1 ng/ml) than in wild-type controls (65.6 ng/ml)
• levels after 15 minutes of restraint rise to 274 ng/ml in mutants vs 215 ng/ml in wild-type; with repeated restraint, levels in wild-type fall to 142 ng/ml, but continue to increase in mutant mice to 480 ng/ml
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