THE EFFECT OF DNA BINDING ON INITIAL 8‐METHOXYPSORALEN PHOTOCHEMISTRY*

Abstract
—Flash photolysis experiments on the complex of 8‐methoxypsoralen with calf thymus DNA have shown binding promotes the anaerobic quenching of the 8‐MOP triplet state and inhibits the accessibility to oxygen. The results indicate dark psoralen‐DNA interactions suppress the singlet oxygen generation observed in prior work.