title: A mutant of the plasmid R100.1 capable of producing autonomous circular forms of its resistance determinant.
mesh_terms: D002876:Chromosomes, Bacterial / Q000502:physiology; D003090:Coliphages / Q000235:genetics; D004262:DNA Restriction Enzymes; D004270:DNA, Circular / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics*; D005838:Genotype; D008854:Microscopy, Electron; D009154:Mutation; D011815:R Factors; D013045:Species Specificity
chemical_list: D004270:DNA, Circular; D004262:DNA Restriction Enzymes