title: Initiation complexes of Escherichia coli RNA polymerase and T7 DNA.
mesh_terms: D000255:Adenosine Triphosphate; D000645:Ammonium Sulfate; D002499:Centrifugation, Density Gradient; D003090:Coliphages; D004279:DNA, Viral; D012321:DNA-Directed RNA Polymerases; D004926:Escherichia coli / Q000201:enzymology*; D006160:Guanosine Triphosphate; D007700:Kinetics; D008851:Micropore Filters; D011485:Protein Binding; D012265:Ribonucleotides; D012293:Rifampin; D014316:Tritium
chemical_list: D004279:DNA, Viral; D012265:Ribonucleotides; D014316:Tritium; D006160:Guanosine Triphosphate; D000255:Adenosine Triphosphate; D012321:DNA-Directed RNA Polymerases; D000645:Ammonium Sulfate; D012293:Rifampin