title: Exchange of the sigma subunit of RNA polymerase.
mesh_terms: D002501:Centrifugation, Zonal; D012321:DNA-Directed RNA Polymerases; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000201:enzymology*; D046911:Macromolecular Substances; D008722:Methods; D011487:Protein Conformation; D012294:Rifamycins; D013462:Sulfur Radioisotopes
chemical_list: D046911:Macromolecular Substances; D012294:Rifamycins; D013462:Sulfur Radioisotopes; D012321:DNA-Directed RNA Polymerases