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[Changes in the content of ribosomal RNA and the activity of ribosomal RNAase in the brain under natural physiological conditions].

Optimal activity of RNAase from brain ribosomal fraction was observed at pH 5.4 and pH 7.9. After alimentary and conditioned-alimentary stimulation content of rRNA was significantly increased in brain, but the RNAase activity was decreased more than two-fold. After conditioned-alimentary inhibition content of rRNA was slightly decreased as compared to experiments with alimentary and conditioned-alimentary stimulation, but it was distinctly higher than in control. As compared with alimentary stimulation in the conditioned-alimentary stimulation the RNAase activity was increased at pH 5.4 and decreased at pH 7.9.