title: Two new ribosomal precursor particles in E. coli.
mesh_terms: D002499:Centrifugation, Density Gradient; D004926:Escherichia coli / Q000378:metabolism*; D008970:Molecular Weight; D010759:Phosphorus Isotopes; D012329:RNA, Bacterial / Q000032:analysis / Q000096:biosynthesis / Q000378:metabolism; D012335:RNA, Ribosomal / Q000032:analysis / Q000096:biosynthesis* / Q000378:metabolism
chemical_list: D010759:Phosphorus Isotopes; D012329:RNA, Bacterial; D012335:RNA, Ribosomal