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Issue 10, 2018
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Photoreduction of ferricytochrome c in the presence of potassium ferrocyanide

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Abstract

Ferricytochrome c has been previously shown to photoreduce in the presence of ferrocyanide anions, but the process has been poorly understood. Here, we propose a kinetic model for this phenomenon and support it with resonance Raman measurements that show a clear dependence of photoreduction on the concentration of mixture components and laser power. Our data are consistent with the photoreduction process that is driven by photoexcitation of the heme followed by an electron transfer from the excited state of the heme macrocycle to the heme iron. Concomitantly, the hole in the heme ground state is filled with an electron transferred from a ferrocyanide ion residing in the heme pocket.

Graphical abstract: Photoreduction of ferricytochrome c in the presence of potassium ferrocyanide

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Publication details

The article was received on 05 Jul 2018, accepted on 16 Sep 2018 and first published on 17 Sep 2018


Article type: Paper
DOI: 10.1039/C8PP00286J
Citation: Photochem. Photobiol. Sci., 2018,17, 1462-1468
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    Photoreduction of ferricytochrome c in the presence of potassium ferrocyanide

    D. Malyshka and R. Schweitzer-Stenner, Photochem. Photobiol. Sci., 2018, 17, 1462
    DOI: 10.1039/C8PP00286J

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