Electron microscope heteroduplex studies of sequence relations among plasmids of Escherichia coli. II. Structure of drug resistance (R) factors and F factors.

DNA, Bacterial/analysis DNA, Circular/analysis Drug Resistance, Microbial Escherichia coli/analysis,cytology,drug effects,metabolism Genetics, Microbial Microscopy, Electron Models, Biological Molecular Weight Nucleic Acid Denaturation Nucleic Acid Renaturation Recombination, Genetic Sex Tetracycline/pharmacology

DNA, Bacterial DNA, Circular Tetracycline