Abstract
Summary
In the adult brain the ribosomes have a higher AMP-level and show a commensurate fall in GMP when compared to the newborn brain. There is a 3-fold total increase of ribosomal RNA in whole adult brain from birth, although the concentration of ribosomal RNA is higher in the young animal brain. There is no difference between neo-natal and adult rat brain ribosomes in their molar concentration of the pyrimidine bases.
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