title: DNA supercoiling by DNA gyrase.
mesh_terms: D004250:DNA Topoisomerases, Type II / Q000378:metabolism*; D004278:DNA, Superhelical; D004926:Escherichia coli / Q000201:enzymology; D011485:Protein Binding
chemical_list: D004278:DNA, Superhelical; D004250:DNA Topoisomerases, Type II