nervous system
• NOTE: It was originally thought that heterozygoous mice as old as 18 months could be visually identified; however, it has been impossible to repeat these results- no histological pathology is detectable.
(J:218228)
• exhibit neurological disease, with onset of mild symptoms at an age (5 months) similar to homozygotes
(J:8492)
• slower emergence of more severe motor neuron disease symptoms than in homozygotes
(J:8492)
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