Cathodic photocurrent generation from zinc-substituted cytochrome b 562 assemblies immobilized on an apocytochrome b562- modified gold electrode

Abstract

Hierarchical assemblies of the noteworthy photoactive cytochrome b 562 reconstituted with zinc protoporphyrin IX covalently linked with the protein surface were constructed on a gold electrode modified with an apoprotein of cytochrome b562. The integrated photoactive hemoproteins were characterized by electrochemical impedance and quartz crystal microbalance analyses. The protein-immobilized electrode exhibits enhanced photocurrent generation relative to the one having a Zn-substituted hemoprotein monolayer. © 2013 The Royal Society of Chemistry.