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- W2079245791 abstract "Time-dependent external perturbations provide powerful probes of the function of molecular machines. Here we study biological proton pumping in an oscillating electric field. The protein cytochrome oxidase is the main energy transducer in aerobic life, converting chemical energy into an electric potential by pumping protons across a membrane. With the help of master-equation descriptions that recover the key thermodynamic and kinetic properties of this biological ``fuel cell,'' we show that the proton pumping efficiency and the electronic currents in steady state depend significantly on the frequency and amplitude of the applied field, allowing us to distinguish between different microscopic mechanisms of the machine. A spectral analysis reveals dominant reaction steps consistent with an electron-gated pumping mechanism." @default.
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- W2079245791 date "2009-12-29" @default.
- W2079245791 modified "2023-09-27" @default.
- W2079245791 title "Biological Proton Pumping in an Oscillating Electric Field" @default.
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- W2079245791 doi "https://doi.org/10.1103/physrevlett.103.268102" @default.
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