title: Circular DNA molecules controlling synthesis and transfer of the surface antigen (K88) in Escherichia coli.
mesh_terms: D000942:Antigens, Bacterial / Q000032:analysis*; D002499:Centrifugation, Density Gradient; D003090:Coliphages; D004269:DNA, Bacterial / Q000032:analysis*; D004270:DNA, Circular / Q000032:analysis; D003720:Densitometry; D000939:Epitopes; D004926:Escherichia coli / Q000166:cytology / Q000276:immunology*; D005111:Extrachromosomal Inheritance; D008854:Microscopy, Electron; D009154:Mutation; D009691:Nucleic Acid Denaturation; D013104:Spheroplasts / Q000032:analysis; D014316:Tritium; D014461:Ultracentrifugation
chemical_list: D000942:Antigens, Bacterial; D004269:DNA, Bacterial; D004270:DNA, Circular; D000939:Epitopes; D014316:Tritium