[On mechanism of nonlinear laser cleavage of DNA].
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.
Benimetskaia
L Z
LZ
Kozionov
A L
AL
Novozhilov
S Iu
SIu
Shtokman
M I
MI
D000818:Animals; D004247:DNA / Q000737:chemistry*; D005609:Free Radicals; D007834:Lasers
D005609:Free Radicals; D004247:DNA