| cytochrome b5 | <chemical> A cytochrome occurring in the endoplasmic reticulum that acts as an intermediate electron carrier in some reactions catalyzed by mixed function oxidases, e.g., fatty acid desaturation. It further activates molecular oxygen for an attack on the substrate. Mw 16kda. Chemical name: Cytochrome b5 (12 Dec 1998) |
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| cytochrome C | A type of cytochrome, a protein which carries electrons, that is central to the process of respiration in mitochondria (an organelle found in eukaryotes which produces energy). (09 Oct 1997) |
| cytochrome c1 | <chemical> The 30-kD membrane-bound c-type protein of mitochondria that functions as an electron donor to cytochrome c in the mitochondrial and bacterial respiratory chain. Chemical name: Cytochrome c1 (12 Dec 1998) |
| cytochrome C1 haem lyase | <enzyme> A mitochondrial haem lyase from saccharomyces cerevisiae; mw about 31 kD; facilitates covalent attachment of haem to the apoforms of c-type cytochromes Registry number: EC 4.99.- Synonym: yeast cc1hl (26 Jun 1999) |
| cytochrome c3 hydrogenase | A hydrogenase enzyme catalyzing reduction of 2ferricytochrome c3 by H2 to 2ferrocytochrome c3 and 2H+. (05 Mar 2000) |
| cytochrome C553 peroxidase | <enzyme> A haem group of cytochrome-c peroxidase (EC 1.11.1.5); catalytically active in both the oxidised and half-reduced states; from nitrosomonas europaea; partial amino acid sequence given in first source Registry number: EC 1.11.1.- (26 Jun 1999) |
| cytochrome cd | cytochrome oxidase (Pseudomonas) |
| cytochrome C hydrolase | <enzyme> From yeast mitochondrial inner membrane Registry number: EC 3.4.- (26 Jun 1999) |
| cytochrome C-methionine methyltransferase | <enzyme> Forms s-methylmethionine Registry number: EC 2.1.1.- Synonym: cyt c-met methyltransferase (26 Jun 1999) |
| cytochrome C methyltransferase | <enzyme> From crithida oncopelti Registry number: EC 2.1.1.- (26 Jun 1999) |
| cytochrome-c oxidase | <enzyme> An enzyme complex of the inner mitochondrial membrane that catalyses the reaction between ferrocytochrome c and oxygen to yield ferricytochrome c and water. It is associated with the pumping of protons and the resultant phosphorylation of ADP to ATP. The reaction is the terminal event in the electron transport scheme by which oxygen is used for fuel combustion. It is a part of Complex IV of the respiratory chain. A deficiency of one or more of the polypeptides of this complex results in neuronal loss in brain leading to psychomotor retardation and neurodegenerative disease. Synonym: cytochrome aa3, indophenol oxidase, indophenolase. Chemical name: Ferricytochrome-c:oxygen oxidoreductase Registry number: EC 1.9.3.1 (12 Dec 1998) |
| cytochrome-c peroxidase | <enzyme> A haemprotein which catalyses the oxidation of ferrocytochrome c to ferricytochrome c in the presence of hydrogen peroxide. Chemical name: Ferrocytochrome c:hydrogen-peroxide oxidoreductase Registry number: EC 1.11.1.5 (12 Dec 1998) |
| cytochrome C synthetase | <enzyme> Forms cytochrome c from the apoprotein + hemin, requires NADPH; mechanism not given 9/81 Registry number: EC 4.99.- Synonym: cytochrome c haem lyase, hccs gene product (26 Jun 1999) |
| cytochrome d | <chemical> Cytochromes (electron-transporting proteins) with a tetrapyrrolic chelate of iron as a prosthetic group in which the degree of conjugation of double bonds is less than in porphyrin. Chemical name: Cytochrome d (12 Dec 1998) |
| cytochrome oxidase | <enzyme> Terminal enzyme of the electron transport chain that accepts electrons from (i.e. Oxidizes) cytochrome C and transfers electrons to molecular oxygen. (18 Nov 1997) |