title: Clustered genes for ribosomal ribonucleic acids in Escherichia coli.
mesh_terms: D002499:Centrifugation, Density Gradient; D002845:Chromatography; D002876:Chromosomes, Bacterial; D004269:DNA, Bacterial; D004926:Escherichia coli; D005796:Genes; D006824:Hybridization, Genetic; D008970:Molecular Weight; D010759:Phosphorus Isotopes; D012329:RNA, Bacterial; D012260:Ribonucleases; D012270:Ribosomes; D014461:Ultracentrifugation
chemical_list: D004269:DNA, Bacterial; D010759:Phosphorus Isotopes; D012329:RNA, Bacterial; D012260:Ribonucleases