behavior/neurological
• at 8-14 weeks of age, mice spend significantly less time in the open arms of an elevated plus maze than wild-type controls
• however, total locomotion in an open field test is normal
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• 24 h after training, mice show increased freezing behavior in both the contextual and cued fear-conditioning tests relative to wild-type controls
• however, no differences in the freezing response are observed during training days
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