title: Isolation of mutants of Escherichia coli lac   king 5-methyluracil in transfer ribonucleic acid or 1-methylguanine in ribosomal RNA.
mesh_terms: D002247:Carbon Isotopes; D002874:Chromosome Mapping; D004926:Escherichia coli / Q000032:analysis / Q000302:isolation & purification*; D006147:Guanine / Q000032:analysis; D008745:Methylation; D009154:Mutation; D012329:RNA, Bacterial / Q000032:analysis*; D012343:RNA, Transfer / Q000032:analysis*; D011995:Recombination, Genetic; D012270:Ribosomes / Q000032:analysis*; D014498:Uracil / Q000032:analysis
chemical_list: D002247:Carbon Isotopes; D012329:RNA, Bacterial; D014498:Uracil; D006147:Guanine; D012343:RNA, Transfer