title: Catenation of DNA rings by topoisomerases. Mechanism of control by spermidine.
mesh_terms: D003035:Cobalt / Q000494:pharmacology; D004264:DNA Topoisomerases, Type I / Q000378:metabolism*; D004250:DNA Topoisomerases, Type II / Q000378:metabolism; D004270:DNA, Circular; D007700:Kinetics; D046911:Macromolecular Substances; D009994:Osmolar Concentration; D011189:Potassium Chloride / Q000494:pharmacology; D013095:Spermidine / Q000494:pharmacology*
chemical_list: D004270:DNA, Circular; D046911:Macromolecular Substances; C030862:cobalt ammonium complex; D003035:Cobalt; D011189:Potassium Chloride; D004264:DNA Topoisomerases, Type I; D004250:DNA Topoisomerases, Type II; D013095:Spermidine