Activation of Glutathione Reductase by Light: A Novel Approach to Design Redox Photo‐Enzymes

Light‐induced electron transfer within a protein, coupled with chemical transformations, was achieved with the glutathione reductase modified by eosin isothiocyanate. The dye functions both as an initiator for the electron transfer and as a relay unit in the protein backbone that facilitates the electrical communication with the redox center at which the oxidized glutathione is reduced.