title: Electron microscopic localization of the binding sites of Escherichia coli RNA polymerase in the early promoter region of T7 DNA.
mesh_terms: D001665:Binding Sites; D004279:DNA, Viral / Q000032:analysis*; D012321:DNA-Directed RNA Polymerases / Q000032:analysis*; D003609:Dactinomycin; D004926:Escherichia coli / Q000201:enzymology*; D004996:Ethidium; D006493:Heparin; D008854:Microscopy, Electron; D012367:RNA, Viral / Q000096:biosynthesis; D012293:Rifampin
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral; D003609:Dactinomycin; D006493:Heparin; D012321:DNA-Directed RNA Polymerases; D004996:Ethidium; D012293:Rifampin