Choline acetylase in the gill plates ofMytilus edulis

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Abstract
Previous work has shown that ciliary movement in the gill plates of Mytilus edulis is controlled by acetylcholine. This substance was shown to be present in the gill plates together with the enzyme "true" cholinesterase. The action of acetylcholine, eserine, atropine and d-tubocurarine was consistent with the view that naturally formed acetylcholine maintained the ciliary rhythm. The evidence of the presence of a choline-acetylase system was however weak, and a new investigation has therefore been made, in which tenfold higher values for choline acetylase have been obtained. The effect of temperature on this enzyme has been studied.
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