title: Physical and functional heterogeneity of E. coli ribosomes.
mesh_terms: D001426:Bacterial Proteins / Q000032:analysis / Q000096:biosynthesis; D002845:Chromatography; D002850:Chromatography, Gel; D004926:Escherichia coli / Q000166:cytology* / Q000378:metabolism; D008239:Lysine / Q000378:metabolism; D008722:Methods; D008970:Molecular Weight; D012270:Ribosomes / Q000032:analysis / Q000378:metabolism; D014316:Tritium; D014461:Ultracentrifugation
chemical_list: D001426:Bacterial Proteins; D014316:Tritium; D008239:Lysine