title: Cruciform structures in supercoiled DNA.
mesh_terms: D001483:Base Sequence; D004269:DNA, Bacterial; D004277:DNA, Single-Stranded / Q000378:metabolism; D004278:DNA, Superhelical; D008970:Molecular Weight; D009690:Nucleic Acid Conformation; D010957:Plasmids; D013329:Structure-Activity Relationship
chemical_list: D004269:DNA, Bacterial; D004277:DNA, Single-Stranded; D004278:DNA, Superhelical