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In this study, electrochemical characterisation of glucose oxidation has been carried out in solution and using enzyme polymer electrodes prepared by mutant glucose oxidase (B11-GOx) obtained from directed protein evolution and wild type enzymes. Higher glucose oxidation currents were obtained from B11-GOx both in solution and polymer electrodes compared to wt-GOx. This demonstrates an improved electrocatalytic activity towards electrochemical oxidation of glucose from the mutant enzyme. The enzyme electrode with B11-GOx also showed a faster electron transfer indicating a better electronic interaction with the polymer mediator. These encouraging results have shown a promising application of enzymes developed by directed evolution tailored for the applications of biosensors and biofuel cells.
Author(s): Yu EH, Prodanovic R, Guven G, Ostafe R, Schwaneberg U
Publication type: Article
Publication status: Published
Journal: Applied Biochemistry and Biotechnology
Print publication date: 13/09/2011
ISSN (print): 0273-2289
ISSN (electronic): 1559-0291
Publisher: Humana Press, Inc.
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