title: [Mutant tRNA His  ineffective in repression and lacking two pseudouridine modifications].
mesh_terms: D001345:Autoradiography; D001483:Base Sequence; D002247:Carbon Isotopes; D002845:Chromatography; D004586:Electrophoresis; D004794:Enzyme Repression; D005815:Genetic Code; D006639:Histidine / Q000378:metabolism; D007930:Leucine / Q000378:metabolism; D009154:Mutation; D009711:Nucleotides / Q000032:analysis*; D009876:Operon; D012329:RNA, Bacterial / Q000032:analysis; D012343:RNA, Transfer / Q000032:analysis*; D012486:Salmonella typhimurium / Q000032:analysis; D014316:Tritium
chemical_list: D002247:Carbon Isotopes; D009711:Nucleotides; D012329:RNA, Bacterial; D014316:Tritium; D006639:Histidine; D012343:RNA, Transfer; D007930:Leucine