Editing Cytochrome c (section)

=== Electron transport chain ===
{{main|Electron transport chain}}

Cytochrome c is an essential component of the respiratory [[electron transport chain]] in mitochondria. The [[heme]] group of cytochrome c accepts electrons from the [[Complex III|bc{{sub|1}} Complex III]] and transports them to [[cytochrome c oxidase|Complex IV]], while it transfers energy in the opposite direction.{{cn|date=November 2024}}

Cytochrome c can also catalyze several redox reactions such as [[hydroxylation]] and [[aromatic]] [[oxidation]], and shows [[peroxidase]] activity by oxidation of various electron donors such as 2,2-azino-''bis''(3-ethylbenzthiazoline-6-sulfonic acid) ([[ABTS]]), 2-keto-4-thiomethyl butyric acid and 4-aminoantipyrine.{{cn|date=November 2024}}

A bacterial cytochrome ''c'' functions as a [[cytochrome c nitrite reductase|nitrite reductase]].<ref>{{Cite book |title=The Metal-Driven Biogeochemistry of Gaseous Compounds in the Environment |vauthors=Schneider J, Kroneck PM |publisher=Springer |year=2014 |isbn=978-94-017-9268-4 |veditors=Kroneck PM, Torres ME |series=Metal Ions in Life Sciences |volume=14 |pages=211–236 |chapter=The Production of Ammonia by Multiheme Cytochromes C |doi=10.1007/978-94-017-9269-1_9 |pmid=25416396}}</ref>