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Cathodic photocurrent generation from zinc-substituted cytochrome b562 assemblies immobilized on an apocytochrome
Akira Onoda1, Yasuaki Kakikura, Takashi Hayashi
1Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. onoda@chem.eng.osaka-u.ac.jp thayashi@chem.eng.osaka-u.ac.jp.
Abstract:
Hierarchical assemblies of the noteworthy photoactive cytochrome b562 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.
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