title: Evidence for the existence of the colicinogenic factors E2 and E3 as supercoiled circular DNA-protein relaxation complexes.
mesh_terms: D002499:Centrifugation, Density Gradient; D003087:Colicins / Q000096:biosynthesis*; D004269:DNA, Bacterial; D003902:Detergents; D004926:Escherichia coli; D005111:Extrachromosomal Inheritance; D006863:Hydrogen-Ion Concentration; D009698:Nucleoproteins / Q000302:isolation & purification*; D010447:Peptide Hydrolases; D010759:Phosphorus Isotopes; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
chemical_list: D003087:Colicins; D004269:DNA, Bacterial; D003902:Detergents; D009698:Nucleoproteins; D010759:Phosphorus Isotopes; D014316:Tritium; D010447:Peptide Hydrolases; D013936:Thymidine