中国科学B辑(英文版)
中國科學B輯(英文版)
중국과학B집(영문판)
SCIENCE IN CHINA(SCIENTIA SINICA)
2003年
5期
439-444
,共6页
晏利琴%宋钦华%黑晓明%王文锋%郭庆祥
晏利琴%宋欽華%黑曉明%王文鋒%郭慶祥
안리금%송흠화%흑효명%왕문봉%곽경상
cyclobutane pyrimidine dimer%pulse radiolysis%riboflavin%flavin adenine dinucleotide%electron transfer%DNA photoreactivation
Utilizing a pulse radiolysis equipment with time-resolved optical detector, kinetic processes of electron-induced splitting of cis-syn 1,3-dimethyluracil cyclobutane dimer (DMUD) in aqueous solution were investigated in the presence or absence of riboflavin (RF) or flavin adenine dinucleotide (FAD). It has been observed that the cyclobutane pyrimidine dimer reacting with hydrated electron splits spontaneously to give a monomer and a monomer radical anion, and the anion transfers one electron to RF or FAD. From the buildup kinetics of radical species, the rate constants of electron transfer from the monomer radical anion to RF and FAD have been determined. On the basis of comparison of the interactions between DMUD and hydrated electron in the presence and absence of RF or FAD, a chain reaction process in the absence of RF or FAD has been demonstrated.
