title: Electron microscope heteroduplex studies of sequence relationships among plasmids of the W incompatibility group.
mesh_terms: D004269:DNA, Bacterial; D004926:Escherichia coli / Q000235:genetics*; D008854:Microscopy, Electron; D008970:Molecular Weight; D009690:Nucleic Acid Conformation; D010957:Plasmids; D011815:R Factors
chemical_list: D004269:DNA, Bacterial