Supercoiling in closed circular DNA: dependence upon ion type and concentration.
D000838:Anions; D002414:Cations, Monovalent; D055598:Chemical Phenomena; D002621:Chemistry; D004270:DNA, Circular; D004587:Electrophoresis, Agar Gel; D009690:Nucleic Acid Conformation; D009994:Osmolar Concentration
D000838:Anions; D002414:Cations, Monovalent; D004270:DNA, Circular