Properties of RNA fractions from nuclei of brain cells which stimulate incorporation of amino acids by brain ribosomes.

Amino Acids/metabolism Animals Brain/cytology,metabolism Brain Chemistry Carbon Isotopes Cell Nucleus/analysis Centrifugation, Density Gradient In Vitro Techniques Leucine/metabolism Magnesium/analysis Male Molecular Weight Potassium/analysis Protein Biosynthesis RNA/isolation & purification,pharmacology RNA, Messenger/pharmacology RNA, Transfer/isolation & purification Rats Ribosomes/metabolism Stimulation, Chemical

Amino Acids Carbon Isotopes RNA, Messenger RNA RNA, Transfer Leucine Magnesium Potassium