title: [Cleavage of DNA fragments induced by UV nanosecond laser excitation at 193 nm].
abstract: The cleavage of dsDNA fragments in aqueous solution after irradiation with UV laser pulses at 193 nm has been studied. Samples were investigated using polyacrylamide gel electrophoresis. The intensity of damage of particular phosphodiester bond after hot alkali treatment was shown to depend on the base pair sequence. It was established that the probability of cleavage is twice higher for sites of DNA containing two or more successively running guanine residues. A possible mechanism of damage to the DNA molecule connected with the migration of holes along the helix is discussed.
authors.forename: N N
authors.initials: NN
authors.lastname: Vtiurina
authors.forename: S L
authors.initials: SL
authors.lastname: Grokhovskiĭ
authors.forename: I V
authors.initials: IV
authors.lastname: Filimonov
authors.forename: O I
authors.initials: OI
authors.lastname: Medvedkov
authors.forename: D Iu
authors.initials: DIu
authors.lastname: Nechipurenko
authors.forename: S A
authors.initials: SA
authors.lastname: Vasil'ev
authors.forename: Iu D
authors.initials: IuD
authors.lastname: Nechipurenko
mesh_terms: D004247:DNA / Q000737:chemistry*; D004249:DNA Damage / Q000528:radiation effects*; D007834:Lasers; D014466:Ultraviolet Rays
chemical_list: D004247:DNA