Photochemical Reduction of NADP+ by Zinc Protoporphyrin Reconstituted Myoglobin as a Simple Model of Photosystem I

Photoinduced electron transfer between zinc protoporphyrin reconstituted myoglobin (Zn-Mb) and NADP functions as a model of photosystem I by forming NADPH. The reduction efficiency of NADP depended strongly on the solution pH, which was explained by the difference in the redox potential and/or the static interaction between Zn-Mb and a sacrificial donor triethanolamine (TEA).