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KMID : 0545120040140051043
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Journal of Microbiology and Biotechnology
2004 Volume.14 No. 5 p.1043 ~ p.1046
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Electrochemical Property of Immobilized Spinach Ferredoxin on HOPG Electrode
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Nam YS
Kim YS/Shin WS/Lee WH/Choi JW
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Abstract
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The stability and electrochemical properties of a self-assembled layer of spinach ferredoxin on a quartz substrate and on a highly oriented pyrolytic graphite electrode were investigated. To fabricate the ferredoxin self-assembly layer dimyristoylphosphatidylcholine was first deposited onto a substrate for ferredoxin immobilization. Surface analysis of the ferredoxin layer was carried out by atomic force microscopy to verify the ferredoxin immobilization. To verify ferredoxin immobilization on the lipid layer and to confirm the maintenance of redox activity absorption spectrum measurement was carried out. Finally cyclic-voltammetry measurements were performed on the ferredoxin layers and the redox potentials were obtained. The redox potential of immobilized ferredoxin had a formal potential value of -540 mV. It is suggested that the redox-potential measurement of self-assembled ferredoxin molecules could be used to construct a biosensor and biodevice.
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