Lexic.us

Definition of Cytochrome

1. Noun. (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration).

Definition of Cytochrome

1. Noun. Any of various related hemoproteins found in the cells of most organisms, which are an important part of cell respiration. ¹

¹ Source: wiktionary.com

Definition of Cytochrome

1. [n -S]

Medical Definition of Cytochrome

1. Any electron transfer haemoprotein having a mode of action in which the transfer of a single electron is effected by a reversible valence change of the central iron atom of the haem prosthetic group between the +2 and +3 oxidation states. Classified as cytochromes a in which the haem contains a formyl side chain, cytochromes b, which contain protohaem or a closely similar haem that is not covalently bound to the protein, cytochromes C in which protohaem or other haem is covalently bound to the protein and cytochromes d in which the iron tetrapyrrole has fewer conjugated double bonds than the haems have. Well known cytochromes have been numbered consecutively within groups and are designated by subscripts (beginning with no subscript), for example cytochromes C, c1, C2,. New cytochromes are named according to the wavelength in nanometres of the absorption maximum of the a band of the iron (II) form in pyridine, for example, C 555. Origin: Gr. Chroma = colour This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Cytochrome

Literary usage of Cytochrome

Below you will find example usage of this term as found in modern and/or classical literature:

1. Reviews in Environmental Health (1998): Toxicological Defense Mechanics edited by Gary E. R. Hook, George W. Lucier (2000)
"The regulation by gender, strain, dose and feeding status of the induction of multiple forms of cytochrome P450 isozymes in 86. ..."

2. Oxygen/Nitrogen Radicals and Cellular Injury edited by Kenneth B. Adler, Robert D. Devlin, Val Vallyathan (2000)
"One is cytochrome c, which acts with cytosolic factors to induce nuclear apoptosis (17). The other is a 50-kDa protease that by itself suffices to cause ..."

3. Science by American Association for the Advancement of Science (1883)
"cytochrome с is an electron-transporting enzyme of the respiratory chain, responsible for the transfer of electrons from cytochrome b to cytochrome oxidase ..."

4. The Journal of Comparative Pathology and Therapeutics (1888)
"They found a significant reduction in the copper content and cytochrome oxidase ... It therefore seemed of interest to examine the sites of cytochrome ..."

5. Smokeless Tobacco Or Health: An International Perspective by DIANE Publishing Company (1995)
"Miller, MS, Jones, AB, Anderson, LM The formation of 3-methylcholanthrene-initiated lung tumors correlates with induction of cytochrome ..."

6. Gene Expression in Field Crops: Bibliography January 1991-November 1992 edited by Janet Saunders, Robert D. Warmbrodt (1995)
"The transformants in which the foreign cytochrome P-450 protein is expressed show marked phenotypic changes, notably a tendency rapidly to senesce. ..."

7. Gene Expression in Horticultural Crops: Bibliography January 1991-October 1992 by Robert D. Warmbrodt (1995)
"Using heterologous antibodies directed against cytochrome с I from yeast two types of clones were isolated from an expression library, suggesting that at ..."

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