title: A sharp structural transition in pA03 plasmid DNA caused by increased superhelix density.
mesh_terms: D001483:Base Sequence; D004262:DNA Restriction Enzymes; D004278:DNA, Superhelical / Q000235:genetics*; D004591:Electrophoresis, Polyacrylamide Gel; D004720:Endonucleases; D004926:Escherichia coli / Q000235:genetics*; D009690:Nucleic Acid Conformation; D010957:Plasmids; D015719:Single-Strand Specific DNA and RNA Endonucleases
chemical_list: D004278:DNA, Superhelical; D004720:Endonucleases; D004262:DNA Restriction Enzymes; D015719:Single-Strand Specific DNA and RNA Endonucleases