Table 1. Comparison of electroanalytical and electrocatalytical characteristics of the proposed modifications of the electrode surface in order to increase the efficiency of electrocatalysis
Electrode |
Ered, V |
Ecat, V |
Eonset, V |
IO2, A×10-7 |
IEr, A×10-7 |
IEr/IO2 |
Vmax,M/min |
SPE/DDAB/CYP3A4 |
-0.438±0.006 |
-0.438±0.006 |
-0.228±0.003 |
-3.71±0.51 |
-6.05±0.63 |
1.63±0.14 |
9.21±1.69×10–11 |
SPE/DDAB/CYP3A4+FMN |
-0.452±0.01 |
-0.439±0.012 |
-0.184±0.006 |
-7.47±1.32 |
-4.83±1.2 |
0.65±0.15 |
1.87±0.19×10–10 |
SPE/DDAB/CYP3A4+FAD |
-0.462±0.001 |
-0.459±0.006 |
-0.201±0.002 |
-8.25±1.13 |
-6.26±1.21 |
0.75±0.05 |
1.58±0.14×10-10 |
SPE/DDAB/CYP3A4+riboflavin |
-0.457±0.007 |
-0.447±0.007 |
-0.211±0.003 |
-7.14±2.29 |
-6.01±0.34 |
0.89±0.25 |
1.24±0.07×10-10 |
SPE/Anodisc 100 μm/DDAB/CYP3A4 |
-0.368±0.005 |
-0.385±0.021 |
-0.205±0.008 |
-1.01±0.43 |
-1.30±0.83 |
1.12±0.8 |
1.01±0.04×10–9 |
SPE /Anodisc 200 μm/DDAB/ CYP3A4 |
-0.342±0.022 |
-0.402±0.013 |
-0.229±0.005 |
-1.61±0.82 |
-1.07±0.76 |
0.73±0.13 |
5.73±0.3×10-10 |
SPE/DDAB/SLO/CYP3A4 |
-0.462±0.001 |
-0.445±0.006 |
-0.264±0.020 |
-9.01±1.59 |
-12.22±2.49 |
1.57±0.17 |
4.52±0.33×10-10 |
SPE/DDAB/CYP3A4BR |
-0.432±0.014 |
-0.417±0.023 |
-0.294±0.006 |
-2.36±0.79 |
-2.81±0.53 |
1.19±0.17 |
2.34±0.48×10-10 |
Note. Ered - peak potential of CYP reduction; Ecat -peak potential of CYP reduction in the presence of substrate; Eonset -substrate catalysis initiation potential; IO2, catalytic current of cytochrome P450 reduction in the presence of oxygen; IEr - catalytic current of cytochrome P450 reduction in the presence of substrate; Vmax - maximum rate of enzymatic electrocatalytic reaction. The results were obtained from 3 experiments.