Summary
A method is described allowing localization of acetylcholinesterase (AChE) by both light and electron microscopy. During the reaction lead thio-diacetyl is decomposed, and therefore precipitated as PbS in the presence of native-SH group produced by the hydrolysis of acetylthiocholine perchlorate. The reaction takes place at neutral pH, since improves the sensitivity of AChE localizations. Application of the method to parasympathetic neurons showed that AChE was mainly localized in the rough endoplasmic reticulum of the perikaryons. No reaction was visible in glial cells. AChE was also localized on the plasma membrane of parasympathetic neurons. In mouse embryo muscles AChE activity was seen to be high and was not yet restricted to the synaptic area. The well developed Schwann cells accompanying the neurites displayed constant AChE activity on their plasma membrane.
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Gautron, J. Ultrastructural localization of acetylcholinesterase. Histochemistry 76, 469–478 (1982). https://doi.org/10.1007/BF00489902
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DOI: https://doi.org/10.1007/BF00489902