Biological proton pumping in an oscillating electric field.
This paper models biological proton pumping in cytochrome c oxidase under an applied oscillating electric field. The authors report that proton pumping efficiency and steady-state electronic currents vary significantly with the field’s frequency and amplitude. A spectral analysis is described as supporting dominant reaction steps consistent with an electron-gated pumping mechanism.
Key points
- The study examines cytochrome c oxidase proton pumping under a time-varying (oscillating) external electric field.
- A master-equation framework is used to capture thermodynamic and kinetic properties of the system.
- Steady-state proton pumping efficiency is reported to depend on the applied field’s frequency and amplitude.
- Steady-state electronic currents are also reported to depend on field frequency and amplitude.
- The field dependence is used to distinguish between different microscopic mechanisms of the molecular machine.
- Spectral analysis is reported to identify dominant reaction steps consistent with an electron-gated pumping mechanism.
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AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
AI-generated summaries may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.
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