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Acetylcholinesterase Activity in the Region of the Nematode Nerve Ring: Improved Histochemical Specificity Using Ultrasonic Pretreatment

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For more content, see Nematology.

Panagrellus redivivus, Caenorhabditis elegans, Prionchulus punctatus, Aphelenchus avenae and Ditylenchus dipsaci were stained for cholinesterase activity using the 'direct-colouring' thiocholine method. Enzyme activity was concentrated in the region of the nerve ring in each species. Ultrasonic pretreatment of intact or cut nematodes was found to greatly improve the staining consistency at the nerve ring, and using two substrates (acetylthiocholine and butyrylthiocholine) and three inhibitors (eserine, BW 284C51, and iso-OMPA) this staining was found to be due to acetylcholinesterase (E.C. activity.

Affiliations: 1: Department of Zoology and Applied Entomology, Imperial College Field Station, Silwood Park, Ascot, Berkshire, SL5 7DE, England


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