Electron transfer between cytochrome c and metalloporphyrins at high exothermicities

✍ Scribed by K.C. Cho; K.M. Ng; C.L. Choy; C.M. Che

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 392 KB
• Volume: 129
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(86)80240-8

✦ Synopsis

The electron-transfer rates between cytochrome c and the anion radical of two metalloporphyrins ZnTPPS and ZnTPPC (A,5 for the reaction is I .42 eV) have been measured by laser flash spectroscopy. The anion radicals were produced by reaction of the porphyrins with hydrated electrons which resulted from the photoionization of ferrocyanide ions. Together with results obtained previously, a reorganization energy of z 1. I eV was deduced for the cytochrome c-porphyrin system.