title: Collapse of DNA caused by trivalent cations: pH and ionic specificity effects.
mesh_terms: D002412:Cations; D003035:Cobalt; D003090:Coliphages; D004279:DNA, Viral; D006863:Hydrogen-Ion Concentration; D009690:Nucleic Acid Conformation; D009994:Osmolar Concentration
chemical_list: D002412:Cations; D004279:DNA, Viral; C030862:cobalt ammonium complex; D003035:Cobalt