title: A naturally occurring 43 s ribosomal precursor particle in Escherichia coli: nature and ribonucleic acid composition.
mesh_terms: D001345:Autoradiography; D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D002845:Chromatography; D004926:Escherichia coli / Q000032:analysis* / Q000166:cytology; D010759:Phosphorus Isotopes; D012329:RNA, Bacterial / Q000032:analysis*; D012270:Ribosomes / Q000032:analysis*; D013053:Spectrophotometry; D014498:Uracil / Q000378:metabolism
chemical_list: D002247:Carbon Isotopes; D010759:Phosphorus Isotopes; D012329:RNA, Bacterial; D014498:Uracil