Direct electron transfer of horseradish peroxidase on Nafion-cysteine modified gold electrode

2007 ◽  
Vol 52 (21) ◽  
pp. 6261-6267 ◽  
Author(s):  
Jun Hong ◽  
Ali Akbar Moosavi-Movahedi ◽  
Hedayatollah Ghourchian ◽  
Ahmad Molaei Rad ◽  
Saeed Rezaei-Zarchi
Keyword(s):  
Electron Transfer ◽  
Horseradish Peroxidase ◽  
Gold Electrode ◽  
Direct Electron Transfer

Characterization of Mercaptoethylamine-Modified Gold Electrode Surface and Analyses of Direct Electron Transfer to Putidaredoxin

Langmuir ◽  
1995 ◽  
Vol 11 (12) ◽  
pp. 4818-4822 ◽  
Author(s):  
Ling Sang Wong ◽  
Vincent L. Vilker ◽  
William T. Yap ◽  
Vytas Reipa
Keyword(s):  
Electron Transfer ◽  
Electrode Surface ◽  
Gold Electrode ◽  
Direct Electron Transfer

A direct electron transfer biosensor based on a horseradish peroxidase and gold nanotriangle modified electrode and electrocatalysis

2018 ◽  
Vol 10 (44) ◽  
pp. 5297-5304 ◽  
Author(s):  
Yanyan Niu ◽  
Juan Liu ◽  
Wei Chen ◽  
Chunxiao Yin ◽  
Wenju Weng ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Ionic Liquid ◽  
Horseradish Peroxidase ◽  
Modified Electrode ◽  
Direct Electron Transfer ◽  
Direct Electrochemistry ◽  
Carbon Ionic Liquid Electrode ◽  
Liquid Electrode ◽  
Gold Nanotriangles

Gold nanotriangles (AuNTs) were used as a modifier on the surface of a carbon ionic liquid electrode (CILE), which was applied to realize direct electrochemistry and electrocatalysis of horseradish peroxidase (HRP).

scholarly journals Electrochemical redox transformations of T1 and T2 copper sites in native Trametes hirsuta laccase at gold electrode

2005 ◽  
Vol 385 (3) ◽  
pp. 745-754 ◽  
Author(s):  
Sergey SHLEEV ◽  
Andreas CHRISTENSON ◽  
Vladimir SEREZHENKOV ◽  
Dosymzhan BURBAEV ◽  
Alexander YAROPOLOV ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Gold Electrode ◽  
Direct Electron Transfer ◽  
High Potential ◽  
Redox Potentials ◽  
Hydrogen Electrode ◽  
Trametes Hirsuta ◽  
Redox Transformations ◽  
Copper Site ◽  
Copper Sites

Mediatorless, electrochemically driven, redox transformations of T1 (type 1) and T2 copper sites in Trametes hirsuta laccase were studied by cyclic voltammetry and spectroelectrochemical redox titrations using bare gold electrode. DET (direct electron transfer) between the electrode and the enzyme was observed under anaerobic conditions. From analysis of experimental data it is concluded that the T2 copper site is in DET contact with gold. It was found that electron transfer between the gold surface and the T1 copper site progresses through the T2 copper site. From EPR measurements and electrochemical data it is proposed that the redox potential of the T2 site for high-potential ‘blue’ laccase is equal to about 400 mV versus NHE (normal hydrogen electrode) at pH 6.5. The hypothesis that the redox potentials of the T2 copper sites in low- and high-potential laccases/oxidases from totally different sources might be very similar, i.e. approx. 400 mV, is discussed.

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