title: A new method for selecting RNA polymerase mutants.
mesh_terms: D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects*; D008722:Methods; D009154:Mutation; D012316:RNA Nucleotidyltransferases / Q000037:antagonists & inhibitors*; D012293:Rifampin / Q000494:pharmacology*; D013696:Temperature
chemical_list: D012316:RNA Nucleotidyltransferases; D012293:Rifampin