title: [Preparation of messenger RNA].
mesh_terms: D001412:Bacillus subtilis / Q000032:analysis; D001419:Bacteria / Q000032:analysis; D002247:Carbon Isotopes; D002499:Centrifugation, Density Gradient; D002845:Chromatography; D003470:Culture Media; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000032:analysis; D007553:Isotope Labeling; D008722:Methods; D009876:Operon; D012313:RNA / Q000302:isolation & purification; D012333:RNA, Messenger / Q000302:isolation & purification*; D014316:Tritium; D014364:Tryptophan
chemical_list: D002247:Carbon Isotopes; D003470:Culture Media; D012333:RNA, Messenger; D014316:Tritium; D012313:RNA; D014364:Tryptophan