Abstract
THE pineal gland of the rat has been shown to contain large quantities of the indole serotonin1. This organ can also metabolize serotonin by a unique pathway to form the hormone melatonin (5-methoxy N-acetyltryptamine)2. The content of serotonin1,3 and the activity of the melatonin-forming enzyme4 in the pineal have been found to vary with a 24 h cycle. These rhythms are controlled by information transmitted to the pineal through its sympathetic nerves3,5.
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SHEIN, H., WURTMAN, R. & AXELROD, J. Synthesis of Serotonin by Pineal Glands of the Rat in Organ Culture. Nature 213, 730–731 (1967). https://doi.org/10.1038/213730a0
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DOI: https://doi.org/10.1038/213730a0
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