Electrochemical Study of Microperoxidase-11 Immobilized on the Surface of a Poly-L-lysine Modified Gold Electrode

Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (12): 2268.

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Electrochemical Study of Microperoxidase-11 Immobilized on the Surface of a Poly-L-lysine Modified Gold Electrode

WAGN Feng-Bin¹, ZHENG Jun-Wei², LI Xiao-Wei¹, JI Yuan², GAO Ying³, XING Wei¹, LU Tian-Hong¹

1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2. Department of Chemistry, Suzhou University, Suzhou 215006, China;
3. Department of Chemistry, Haerbin Normal University, Haerbin 150080, China

Received:2002-08-08 Online:2003-12-24 Published:2003-12-24

Abstract

Abstract: MP-11 was immobilized on the surface of the poly-L-lysine modified gold electrode. Direct electron transfer between the heme and the electrode was observed. The formal redox potential for MP-11 immobilized at the gold electrode is -0.39 Vin the phosphate buffer solution(pH=7.0). The MP-11 modified electrode possesses the good electrocatalytic activity for the reduction of O₂When imidazole becomes the sixth ligand, the formal redox potential of MP-11 would shift to the negative direction and the electrocatalytic activity of MP-11 for the reduction of O₂is significantly inhibited.

Key words: Microperoxidase-11, Poly-L-lysine, Imidazole, Electrocatalysis, UV-Vis absorption spectrum

CLC Number:

O646

TrendMD:

WAGN Feng-Bin, ZHENG Jun-Wei, LI Xiao-Wei, JI Yuan, GAO Ying, XING Wei, LU Tian-Hong. Electrochemical Study of Microperoxidase-11 Immobilized on the Surface of a Poly-L-lysine Modified Gold Electrode[J]. Chem. J. Chinese Universities, 2003, 24(12): 2268.

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Electrochemical Study of Microperoxidase-11 Immobilized on the Surface of a Poly-L-lysine Modified Gold Electrode

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