title: A 30 S precursor of 30 S ribosomes in a mutant of Escherichia coli.
abstract: Escherichia coli 15-28, a mutant with a defect in ribosome metabolism, accumulates a ribonucleoprotein particle that is indistinguishable from 30S subunits by sedimentation but contains the precursor form of 16S RNA. This particle is probably a precursor of 30 S ribosomes.
mesh_terms: D002499:Centrifugation, Density Gradient; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000378:metabolism*; D009154:Mutation; D009694:Nucleic Acid Precursors / Q000096:biosynthesis*; D012329:RNA, Bacterial / Q000096:biosynthesis*; D012335:RNA, Ribosomal / Q000096:biosynthesis*; D012261:Ribonucleoproteins / Q000096:biosynthesis; D012270:Ribosomes / Q000032:analysis
chemical_list: D009694:Nucleic Acid Precursors; D012329:RNA, Bacterial; D012335:RNA, Ribosomal; D012261:Ribonucleoproteins