title: Electron microscope heteroduplex studies of sequence relations among plasmids of Escherichia coli. II. Structure of drug resistance (R) factors and F factors.
mesh_terms: D004269:DNA, Bacterial / Q000032:analysis; D004270:DNA, Circular / Q000032:analysis; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000032:analysis / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D005827:Genetics, Microbial; D008854:Microscopy, Electron; D008954:Models, Biological; D008970:Molecular Weight; D009691:Nucleic Acid Denaturation; D009695:Nucleic Acid Renaturation; D011995:Recombination, Genetic; D012723:Sex; D013752:Tetracycline / Q000494:pharmacology
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular; D013752:Tetracycline