title: Genetic fusions defining trp and lac operon regulatory elements.
mesh_terms: D000123:Acetyltransferases / Q000378:metabolism; D002874:Chromosome Mapping; D004926:Escherichia coli / Q000378:metabolism*; D005696:Galactosidases / Q000378:metabolism; D005796:Genes; D005809:Genes, Regulator; D005821:Genetic Techniques; D007785:Lactose; D009154:Mutation; D009876:Operon; D012329:RNA, Bacterial / Q000096:biosynthesis; D012333:RNA, Messenger / Q000096:biosynthesis; D013862:Thiogalactosides; D014158:Transcription, Genetic; D014364:Tryptophan
chemical_list: D012329:RNA, Bacterial; D012333:RNA, Messenger; D013862:Thiogalactosides; D014364:Tryptophan; D000123:Acetyltransferases; D005696:Galactosidases; D007785:Lactose