Photooxidation of Cytochromes c, f, and Plastocyanin by Detergent Treated Chloroplasts

Nieman et al. (16,17) and Bishop et al. (2) described the photooxidation of ferrocytochrome c by detergent treated chloroplasts as an oxygen-consuming, cyanide-insensitive process which was stimulated by a soluble chloroplast enzyme. In an earlier paper, we reported that the quantum yield of this reaction increases at wavelengths beyond 690 m,u (14), and concluded that only the first photoact is operative which is sensitized by chlorophyll a and in which P700 (10) serves as the primary energy converter.