Journal
CHEMICAL SCIENCE
Volume 8, Issue 9, Pages 6423-6432Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc02084h
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Funding
- European Research Council under the European Union Seventh Framework Programme (FP)/ERC [320403]
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To evaluate the possible detection of single enzyme activity via electrochemical methods, a combined finite difference and random walk simulation is used to model individual enzyme-electrode collisions where such events are monitored amperometrically via the measurement of products formed by the enzyme in solution. It is found that the observed signal is highly sensitive to both the enzyme turnover number, the size of the electrode and the bandwidth of the electronics. Taking single catalase impacts as an example, simulation results are compared with experimental data. Our work shows the requirement for the detection of electrochemically active product formed by individual enzymes and gives guidance for the design of experiments.
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