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Content Provider | IEEE Xplore Digital Library |
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Author | Akaike, T. Daido, T. Tanaka, Y. Yamamoto, K. Suzuki, T. |
Copyright Year | 1989 |
Description | Author affiliation: Dept. of Mater. Syst. Eng., Tokyo Univ. of Agric. & Technol., Japan (Akaike, T.; Daido, T.; Tanaka, Y.; Yamamoto, K.; Suzuki, T.) |
Abstract | The coupled reactions of the cytochrome-C(Cyt-C)-immobilized electrode and oxidoreductase, e.g. cytochrome oxidase and diachorase, were examined using horse heart mitochondrial Cyt. C. Diaphorase from Bacillus stearothermophilus was coated on In/sub 2/O/sub 3//SnO/sub 2/ (ITO) electrodes. The polymer-coated electrodes were applied to Cyt. C phosphate-buffered solution (pH 7.4) for cyclic voltammetric analysis. The electron transfer of the immobilized Cyt. C turned out to be ionically controlled. Biochemical assays of immobilized Cyt. C with cytochrome oxidase indicated that apparent cathodic currents of Cyt. C decrease with ionic strength (IS), but that cathodic current per molecule decrease with IS. The electron transfer activity of an immobilized Cyt. C molecule is found to be closely correlated to apparent diffusion constant. The phenomenon suggests that fixed Cyt. C should have adequate rotary freedoml for electron transfer in mitochondrial inner membrane. Cyt. C loosely immobilized on the coated In/sub 2/O/sub 3//SnO/sub 2/ electrode also reacted with diachorase. Because the redox reaction of immobilized Cyt. C could be regulated by the electrode potential, it is though that electrochemical NADH oxidation results from mediation of immobilized Cyt. C. An optimal condition was examined for this coupling reaction.< |
Starting Page | 1337 |
Ending Page | 1338 |
File Size | 147759 |
Page Count | 2 |
File Format | |
DOI | 10.1109/IEMBS.1989.96226 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 1989-11-09 |
Publisher Place | USA |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Artificial biological organs Biomedical electrodes Horses Heart Proteins Electrons Biosensors Polymer films Polymer gels Engineering in medicine and biology |
Content Type | Text |
Resource Type | Article |
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