title: Molecular structure of RNA polymerase and its complex with DNA.
mesh_terms: D004269:DNA, Bacterial; D004926:Escherichia coli / Q000201:enzymology; D005615:Freezing; D008854:Microscopy, Electron; D008961:Models, Structural; D008967:Molecular Biology; D012316:RNA Nucleotidyltransferases; D014461:Ultracentrifugation
chemical_list: D004269:DNA, Bacterial; D012316:RNA Nucleotidyltransferases