The return of acetylcholinesterase activity was studied in several cholinergic structures in the cat after irreversible inactivation by diisopropylfluoro-phosphate. It was found that enzymic activity returned uniformly along the hypoglossal and cervical sympathetic nerve trunks. No evidence for somatoaxonal convection of enzyme was obtained.
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Koenig et al. (1960) studied this question.
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