title: Two origins of replication in composite R plasmid DNA.
mesh_terms: D004261:DNA Replication; D004269:DNA, Bacterial / Q000096:biosynthesis*; D004352:Drug Resistance, Microbial; D005111:Extrachromosomal Inheritance; D008854:Microscopy, Electron; D009691:Nucleic Acid Denaturation; D010957:Plasmids; D011511:Proteus
chemical_list: D004269:DNA, Bacterial