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. 1978 Dec 15;202(4373):1198-20.
doi: 10.1126/science.214852.

The pineal gland: a biological clock in vitro

The pineal gland: a biological clock in vitro

S A Binkley et al. Science. .

Abstract

Circadian rhythmicity was studied by following the course of N-acetyl-transferase activity in the pineal glands of chickens in vitro. The results indicate (i) a daily change during day 1 of organ culture in constant dark that was dependent on the time the chickens were killed, (ii) equivocal persistence of the daily change in constant dark during 6 to 7 days of organ culture, (iii) an effect of light, (iv) inhibition by adrenergic agents and cycloheximide, and (v) stimulation by dibutyryl adenosine 3',5'-monophosphate and related compounds.

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