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Evidence Against The Hopping Mechanism As An Important Electron Transfer Pathway For Conformationally Constrained Oligopeptides.

F. Polo, S. Antonello, F. Formaggio, C. Toniolo, Flavio Maran
Published 2005 · Chemistry, Medicine

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The rate constant of intramolecular electron transfer through oligopeptides based on the alpha-aminoisobutyric acid residue was determined as a function of the peptide length and found to depend weakly on the donor-acceptor separation. By measuring the electron-transfer activation energy and estimating the energy gap between donor and bridge, we were able to discard the electron hopping mechanism.



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