title: [On mechanism of nonlinear laser cleavage of DNA].
abstract: Dependences of nonlinear laser cleavage of DNA on a concentration of the free-radical scavenger, beta-mercaptoethanol, have been measured. The obtained data rule out the free-radical mechanism of the nonlinear laser cleavage and agree with the mechanism based on two-quantum excitation energy transfer from a dye to DNA. A high concentration of beta-mercaptoethanol has been found to cause DNA hyperchromicity.
authors.forename: L Z
authors.initials: LZ
authors.lastname: Benimetskaia
authors.forename: A L
authors.initials: AL
authors.lastname: Kozionov
authors.forename: S Iu
authors.initials: SIu
authors.lastname: Novozhilov
authors.forename: M I
authors.initials: MI
authors.lastname: Shtokman
mesh_terms: D000818:Animals; D004247:DNA / Q000737:chemistry*; D005609:Free Radicals; D007834:Lasers
chemical_list: D005609:Free Radicals; D004247:DNA