Washington, M. Todd Department of Biochemistry, University of Iowa, Iowa City, Iowa.
Last reviewed:February 2021
- Oxidation and reduction
- Electron transport system
- Cytochrome P-450s
- Related Primary Literature
- Additional Reading
A member of a class of proteins containing hemes as prosthetic groups that catalyze oxidation–reduction reactions. Cytochromes are heme-containing proteins (see illustration) that play vital roles in electron transport within cells. It should be noted that cytochromes are distinct from other heme-containing proteins, such as myoglobin and hemoglobin, which function in the binding and transport of molecular oxygen; catalase, which eliminates hydrogen peroxide from cells; and peroxidases, which use hydrogen peroxide to oxidize various substrates. See also: Biological oxidation; Electron-transfer reaction; Oxidation-reduction; Protein
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