title: Initiation of transcription by RNA polymerases of E. coli and phage T3.
mesh_terms: D001665:Binding Sites; D003090:Coliphages / Q000201:enzymology*; D004267:DNA Viruses; D012321:DNA-Directed RNA Polymerases; D004790:Enzyme Induction; D004794:Enzyme Repression; D004926:Escherichia coli / Q000201:enzymology*; D005809:Genes, Regulator; D009876:Operon; D012329:RNA, Bacterial / Q000096:biosynthesis; D012367:RNA, Viral / Q000096:biosynthesis; D014158:Transcription, Genetic
chemical_list: D012329:RNA, Bacterial; D012367:RNA, Viral; D012321:DNA-Directed RNA Polymerases