Abstract
EXPOSURE to an imprinting stimulus has been shown to be associated with an increase in incorporation rates of lysine into protein and uracil into RNA in the forebrain roof in one-day-old chicks' brains1,2. A maximum increase in RNA incorporation is seen at 76 min after the start ofthe imprinting procedure and in protein incorporation at 120 min. Studies of the changes occurring in other protein synthesizing systems in response to external stimuli such as hormones have demonstrated a similar type of temporal sequence for the protein and RNA changes. In hormonal systems one of the events preceding both of these is an increase in RNA polymerase activity3. It seemed reasonable to test whether such an effect also occurs during imprinting in the chick. We present here preliminary results of an enquiry into the effects of the imprinting stimulus on the activity of RNA polymerase in three regions of the chick's brain.
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HAYWOOD, J., ROSE, S. & BATESON, P. Effects of an Imprinting Procedure on RNA Polymerase Activity in the Chick Brain. Nature 228, 373–375 (1970). https://doi.org/10.1038/228373a0
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DOI: https://doi.org/10.1038/228373a0
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