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SUMMARY Acrylylcholine, choline O‐sulfate, and a yet unidentified choline ester have been isolated from cells of Amphidinium carteri. Natural and synthetic acrylyl choline had approximately 1/4,000 the activity of acetylcholine and choline O‐sulfate about 1/20,000 the activity on isolated Mercenaria mercenaria heart.
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Taylor et al. (1974) studied this question.
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