cytochrome

cytochrome /cy·to·chrome/ (si´to-krōm) any of a class of hemoproteins, widely distributed in animal and plant tissues, whose main function is electron transport using the heme prosthetic group; distinguished according to their prosthetic groups, e.g., a, b, c, d, and P-450.

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cy·to·chrome (st-krm)

n.

Any of a class of iron-containing proteins important in cell respiration as catalysts of oxidation-reduction reactions.

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Cytochrome

A substance that contains iron and acts as a hydrogen carrier for the eventual release of energy in aerobic respiration.

Mentioned in: Smoking

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cytochrome

[si′tōkrōm]

Etymology: Gk, kytos, cell, chroma, color

1 a class of hemoproteins whose function is electron transport. These proteins have the ability to change the valence of the heme iron, alternating between ferrous and ferric states.

2 proteins involved in mitochondrial exudative electron transport systems associated with adenosine triphosphate production.

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cytochrome (sī´tkrōm´),

n one of a class of hemoproteins that act as electron transport. Cytochromes are classified as
a, b, c, and
d.

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cytochrome

any of a class of hemoproteins, widely distributed in animal and plant tissue, whose main function is electron transport; distinguished according to their prosthetic group as a, b, c and d.

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cytochrome b5 reductase

a flavoprotein involved in the desaturation of fatty acids in the liver.

cytochrome oxidase

an a type cytochrome which contains copper and receives electrons from another cytochrome, of the c type, and transfers them to oxygen atoms allowing the oxygen to combine with hydrogen atoms to form water. A nutritional deficiency of copper leads to a general reduction in metabolic rate because of the absence of cytochrome oxidase a.

cytochrome system

the sum of cytochromes which play a part in the body's metabolic processes. Includes the cytochrome oxidases and cytochrome reductases.