Summary
The circadian clock in the unicellular algaGonyaulax polyedra is accelerated by a substance in extracts from the cells themselves. The extracts have been fractionated using the circadian rhythm of bioluminescence as bioassay. The active substance, termed gonyauline, has been isolated and characterized as a novel low molecular weight cyclopropanecarboxylic acid (S-methyl-cis-2-(methylthio) cyclopropanecarboxylic acid). Synthetic gonyauline has a similar shortening effect on the period of the circadian clock.
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Roenneberg, T., Nakamura, H., Cranmer, L.D. et al. Gonyauline: A novel endogenous substance shortening the period of the circadian clock of a unicellular alga. Experientia 47, 103–106 (1991). https://doi.org/10.1007/BF02041268
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DOI: https://doi.org/10.1007/BF02041268