in order to study the relationship between certain photophysical and photochemical properties of furocoumarins and their photobiological activities , the quantum yields of the formation of excited triplet states , the capacity to generate singlet oxygen in vitro and the effect of oxygen on photoinduced cell killing and on the induction of cytoplasmic `` '' petite '' '' mutations in saccharomyces cerevisiae were determined for a series of 4'-methylangelicins and 3-carbethoxypsoralen ( 3-cps ) .
C0007634
cell
C0010834
cytoplasmic