cytochrome

(redirected from Cytochromes)
Also found in: Dictionary, Thesaurus, Encyclopedia.

cytochrome

 [si´to-krōm]
any of a class of hemoproteins, widely distributed in animal and plant tissue, whose main function is electron transport; distinguished according to their non–amino acid components as a, b, c, d, etc.

cy·to·chrome

(sī'tō-krōm),
A class of hemoprotein the principal biologic function of which is electron and/or hydrogen transport by virtue of a reversible valency change of the heme iron. Cytochromes are classified in four groups (a, b, c, and d) according to spectrochemical characteristics; many variants exist, particularly among bacteria and in green plants and algae, one being a variant of the c type cytochrome called cytochrome f. The mitochondrial system of cytochromes provides electron transport through cytochrome c oxidase to molecular oxygen as the terminal electron acceptor (respiration).
[cyto- + G. chrōma, color]

cytochrome

(sī′tə-krōm′)
n.
Any of a class of usually colored proteins that contain a heme group, are electron carriers, and catalyze oxidation-reduction reactions during cellular respiration.

cy·to·chrome

(sī'tō-krōm)
A class of hemoprotein the principal biologic function of which is electron or hydrogen transport by virtue of a reversible valency change of the heme iron. Many variants exist, particularly among bacteria and in green plants and algae, one being a variant of the c type cytochrome called cytochrome f. The mitochondrial system of cytochromes provides electron transport through cytochrome c oxidase to molecular oxygen as the terminal electron acceptor (respiration).
[cyto- + G. chrōma, color]

cytochrome

a protein pigment containing iron that is capable of being alternately oxidized and reduced, acting as an electron carrier in, for example, the ELECTRON TRANSPORT SYSTEM of a MITOCHONDRION.

Cytochrome

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

cy·to·chrome

(sī'tō-krōm)
A class of hemoprotein the principal biologic function of which is electron or hydrogen transport.
[cyto- + G. chrōma, color]
References in periodicals archive ?
Modulation of p-glycoprotein expression by cytochrome P450 3A inducers in male and female rat livers.
Anzenbacherova, "Cytochromes P450 and metabolism of xenobiotics," Cellular and Molecular Life Sciences, vol.
Bernhardt, "Cytochromes P450 as versatile biocatalysts," Journal of Biotechnology, vol.
Cytochrome P450 (CYP) is the largest groups of metabolic systems in the liver responsible for the metabolism of therapeutic drugs (Rendic 2002).
(1989) Isolation of two distinct cytochromes [P450.sub.11[beta]] with aldosterone synthase activity from bovine adrenocortical mitochondria.
Table CYP450 enzymes involved in biotransformation of SSRIs SSRI Enzymes involved in biotransformation Citalopram CYP2C19, CYP2D6, CYP3A4 Escitalopram CYP2C19, CYP2D6, CYP3A4 Fluoxetine CYP2D6, CYP2C9, CYP2C19, CYP3A4 Paroxetine CYP1A2, CYP2D6 Fluvoxamine CYP2D6, CYP3A4 Sertraline CYP2C9, CYP2C19, CYP2D6, CYP3A4 CYP: cytochrome P450; SSRI: selective serotonin reuptake inhibitors Source: Reference 10 Because suicidality may be caused by inadequately treated depressive illness, MDD patients who are UMs may be more likely to commit suicide because of suboptimal antidepressant levels.
Key words: Cytochrome b gene, Morphological difference, Mitochondrial DNA, Phylogeny, Vipers.
Astex Therapeutics (Cambridge, England) announced that it has granted a non-exclusive, worldwide license to its cytochrome P450 intellectual property to GlaxoSmithKline.
Microsomes contain the cell's cytochrome P450 (CYP) enzymes, involved in oxidative metabolism.
Cytochrome P-450 (CYP) genes encode for membrane-bound, heme-containing enzymes that catalyze the oxidation of various drugs and endogenous substrates such as vitamin D, steroids, or fatty acids, including arachidonic acid (AA).
Effects of sulfide on the oxidation/reduction state of cytochromes c and oxidase in mussel gills