Canadian Medical Guide > Chemicals and Drugs > Enzymes and Coenzymes > Cytochromes > Cytochrome c Group Terms and Definitions

Cytochrome c Group

Medical Definition:	A group of cytochromes with covalent thioether linkages between either or both of the vinyl side chains of protoheme and the protein. (Enzyme Nomenclature, 1992, p539)
Guide Notes:	spell in titles & translations with lowercase c: cytochrome c; do not confuse with CYTOCHROMES C
Previously Indexed:	Cytochromes (1966-1972)

Cytochrome c Group Categories.

	Cytochromes c - Cytochromes of the c type that are found in eukaryotic MITOCHONDRIA. They serve as redox intermediates that accept electrons from MITOCHONDRIAL ELECTRON TRANSPORT COMPLEX III and transfer them to MITOCHONDRIAL ELECTRON TRANSPORT COMPLEX IV.
	Cytochromes c' - A widely occuring subclass of c type cytochromes which function as electron carriers in the electron transport chain in photosynthetic and denitrifying BACTERIA.
	Cytochromes c1 - The 30-kD membrane-bound c-type cytochrome protein of mitochondria that functions as an electron donor to CYTOCHROME C GROUP in the mitochondrial and bacterial RESPIRATORY CHAIN. (From Enzyme Nomenclature, 1992, p545)
	Cytochromes c2 - Type C cytochromes that are small (12-14 kD) single-heme proteins. They function as mobile electron carriers between membrane-bound enzymes in photosynthetic BACTERIA.
	Cytochromes c6 - Cytochromes of the c type that are involved in the transfer of electrons from CYTOCHROME B6F COMPLEX and PHOTOSYSTEM I.

Cytochrome c Group Medical Definitions and Terms

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