title: [Reversal of B to A transition in DNA by bis-(20guanidoethyl)disulfide].
abstract: Transition from B to A form of DNA in water/ethanol solutions is hindered by stoichiometric quantities of a bifunctional cation, bis-(2-guanidoethyl)disulfide (GED). Using the data on the shift and widening of the B--A transition curves in the presence of GED, a value of the order of 10 base pairs has been estimated for the cooperativity length of the B--A transition which agrees well with the values earlier obtained.
mesh_terms: D000818:Animals; D002417:Cattle; D004247:DNA; D006146:Guanidines; D007700:Kinetics; D009690:Nucleic Acid Conformation; D013950:Thymus Gland
chemical_list: D006146:Guanidines; C014363:bis(2-guanidinoethyl)disulfide; D004247:DNA
vernacular_title: Obrashchenie B--A-perekhoda v DNK bis(2-guanidoetil)disul'fidom.