behavior/neurological
• mice heterozygous for this mutation behave paradoxically in the open field, having a somewhat increased latency to initiate movement (3 s) but exhibiting heightened activity once acclimated to the new environment (in 30 s, all four feet of the founder entered 13 squares)
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• latency to movement when placed in the open field arena = 3 seconds
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• number of squares of the open field arena entered by all 4 feet in 30 s = 13
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