Pineal Enzymes: Regulation of Avian Melatonin Synthesis

摘要: Groups of 8-week-old chickens were killed at six time points in their light-dark cycle, and pineal glands removed assayed individually for N- acetyltransferase activity, hydroxyindole -O- methyltransferase melatonin content. The tenfold nocturnal rise was phased identically with the 27-fold increase activity. relatively small changes (20 percent) activity did not appear important causing large melatonin. phase rhythms content relative to cycle qualitatively similar that rats. In contrast, sleep-wake is about 180° out