title: A catalytic role of low concentration of urea in DNA-polycation interactions.
mesh_terms: D004247:DNA; D009691:Nucleic Acid Denaturation; D011108:Polymers; D014508:Urea
chemical_list: D011108:Polymers; C041617:poly(methylene-4-phenylene-methylene dimethylaminoethylene diamine); D014508:Urea; D004247:DNA