Electron tunneling in cytochrome c

Journal Article (Journal Article)

An upper limit for the extinction coefficient of the charge transfer band in the ferrohexacyanide-ferricytochrome c redox couple has been determined from 800 to 1800 nm. We obtain ε≤0.003 M-1 cm-1 between 800-1400 nm, ε≤0.02 M-1 cm-1 between 1400-1800 nm. Prompt transfer of charge due to excitation in the heme absorption bands occurs with a quantum yield of approximately 10-4. Simple vibronically assisted tunneling theories and appropriate choice of highly localized wave functions have been used to show that tunneling theory can give a reasonable fit to all aspects of charge transfer between cytochrome c and iron hexacyanide, including the small value of the charge transfer band extinction coefficient. © 1982 American Institute of Physics.

Full Text

Duke Authors

Cited Authors

  • Chang, AM; Austin, RH

Published Date

  • January 1, 1982

Published In

Volume / Issue

  • 77 / 11

Start / End Page

  • 5272 - 5283

International Standard Serial Number (ISSN)

  • 0021-9606

Digital Object Identifier (DOI)

  • 10.1063/1.443796

Citation Source

  • Scopus