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We thank Drs. T. Wilson, C. H. Johnson, A. M. Pappenheimer Jr., J. Takahashi and R. Schmid for helpful suggestions. This work was supported by grants from the National Institutes of Health (GM-19536) and the Deutsche Forschungsgemeinschaft (Ro 656/1).
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Roenneberg, T., Hastings, J.W. Two photoreceptors control the circadian clock of a unicellular alga. Naturwissenschaften 75, 206–207 (1988). https://doi.org/10.1007/BF00735584
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DOI: https://doi.org/10.1007/BF00735584