Biologically Active Substance
cytochrome
cy·to·chrome [ sahy-tuh-krohm ]
Subclass of:
Hemeproteins
Etymology:
Greek kytos = vessel or cell + chroma = color
Definitions related to cytochromes:
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A family of membrane-associated, heme-containing proteins that catalyze oxidation and reduction to promote electron transport reactions.NCI ThesaurusU.S. National Cancer Institute, 2021
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Hemeproteins whose characteristic mode of action involves transfer of reducing equivalents which are associated with a reversible change in oxidation state of the prosthetic group. Formally, this redox change involves a single-electron, reversible equilibrium between the Fe(II) and Fe(III) states of the central iron atom (From Enzyme Nomenclature, 1992, p539). The various cytochrome subclasses are organized by the type of HEME and by the wavelength range of their reduced alpha-absorption bands.NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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Cytochrome, any of a group of hemoprotein cell components that, by readily undergoing reduction and oxidation (gain and loss of electrons) with the aid of enzymes, serve a vital function in the transfer of energy within cells. Hemoproteins are proteins linked to a nonprotein, iron-bearing...Encyclopedia Britannica, Inc., 2020
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