title: Purification of DNA-dependent RNA polymerase from Escherichia coli.
mesh_terms: D004926:Escherichia coli / Q000201:enzymology*; D012316:RNA Nucleotidyltransferases / Q000302:isolation & purification*; D014461:Ultracentrifugation
chemical_list: D012316:RNA Nucleotidyltransferases