title: Biogenesis of 50S ribosomes in E. coli: characterization of 43S precursors.
mesh_terms: D000409:Alanine / Q000378:metabolism; D002247:Carbon Isotopes; D002501:Centrifugation, Zonal; D002845:Chromatography; D004926:Escherichia coli / Q000378:metabolism*; D011506:Proteins / Q000032:analysis; D012270:Ribosomes; D014316:Tritium; D014498:Uracil / Q000378:metabolism
chemical_list: D002247:Carbon Isotopes; D011506:Proteins; D014316:Tritium; D014498:Uracil; D000409:Alanine