title: Structure and reactions of closed duplex DNA.
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism; D001435:Bacteriophages; D004396:Coloring Agents; D004264:DNA Topoisomerases, Type I / Q000378:metabolism; D004270:DNA, Circular / Q000378:metabolism; D004277:DNA, Single-Stranded / Q000378:metabolism; D004278:DNA, Superhelical / Q000378:metabolism; D004279:DNA, Viral; D009690:Nucleic Acid Conformation; D011120:Polyomavirus; D013539:Simian virus 40; D013816:Thermodynamics
chemical_list: D001426:Bacterial Proteins; D004396:Coloring Agents; D004270:DNA, Circular; D004277:DNA, Single-Stranded; D004278:DNA, Superhelical; D004279:DNA, Viral; D004264:DNA Topoisomerases, Type I