[Photoinduced peroxidase reduction. Reaction with indolylacetic acid]

Kinetics of photoinduced reaction of HRP reduction by indolil acetic acid and dependence of the reaction rate and fluorescence of indoliol acetic acid on quenchers (I, Cst concentration was investigated. It was demonstrated that both I- and Cst action on the reaction differed from that on fluorescence. So the most probable reaction pathway is that through metastable triplet state of the substrate.