Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (12): 1126-1128.doi: 10.3866/PKU.WHXB20011214

• Note • Previous Articles    

Direct Electrochemistry of Cytochrome C551 from Pseudomonas Aeruginosa at

Yan Jie;Li Jing-Jian;Zhang Bo;Cai Sheng-Min   

  1. College of Chemistry and Molecular Engineering, Peking University,Beijing 100871
  • Received:2001-07-30 Revised:2001-09-25 Published:2001-12-15
  • Contact: Li Jing-Jian E-mail:jjli@chem.pku.edu.cn

Abstract: The direct electrochemistry of cytochrome C551 from pseudomonas aeruginosa has been investigated at indium-doped tin oxide(ITO) optically transparent electrodes without any surface promoters or mediators. The cyclic voltammograms show a quasi-reversible electrode reaction. Plots of peak reduction current against square root of scan rate are linear over the range 5 mV•s-1 to 100 mV•s-1. The diffusion coefficient of C551 is calculated from the slope of the line. The rate constant for heterogeneous electron transfer is determined by measuring cyclic voltammetry peak separation as a function of scan rate.

Key words: Cytochrome C551, ITO electrode, Direct electrochemistry