title: Absence of exchange by ribosomal proteins in extracts of Escherichia coli.
mesh_terms: D001426:Bacterial Proteins / Q000096:biosynthesis / Q000378:metabolism*; D002250:Carbon Radioisotopes; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000378:metabolism*; D007930:Leucine; D009154:Mutation; D010649:Phenylalanine / Q000378:metabolism; D014176:Protein Biosynthesis; D012270:Ribosomes / Q000378:metabolism*; D014316:Tritium
chemical_list: D001426:Bacterial Proteins; D002250:Carbon Radioisotopes; D014316:Tritium; D010649:Phenylalanine; D007930:Leucine