Effect of pH on direct electron transfer in the system gold electrode-recombinant horseradish peroxidase
The effect of pH on the kinetics of the bioelectrocatalytic reduction of H2O2 catalysed by horseradish peroxidase (HRP) has been studied at –50 mV vs. AgjAgCl on HRP-modified Au electrodes placed in a wall-jet flow-through electrochemical cell. Native HRP (nHRP) and a nonglycosylated recombinant form containing a six-histidine tag at the C-terminus, CHisrHRP, produced by genetic engineering of non