title: 70S ribosomes are active.
mesh_terms: D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D004926:Escherichia coli; D012333:RNA, Messenger; D012270:Ribosomes / Q000378:metabolism*; D014498:Uracil / Q000378:metabolism
chemical_list: D002247:Carbon Isotopes; D012333:RNA, Messenger; D014498:Uracil