Photoexcited flavins and pterins as electron injectors for multiheme cytochrome

Kritsky et al conducted a study to select a natural ligand that ensures heme reduction and functioning of the catalytic site of the enzyme. Relative photosensitizing activity of different avins and pteridines differed from the distribution of the electron-donor activity in the series of their reduced forms determined during their incubation with the enzyme in the dark.