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Charge interactions of cytochrome c with cytochrome c oxidase
International Journal of Biochemistry, 1984The pyridoxal phosphate (PLP) modification of the lysine amino groups in cytochrome c causes decrease in the reaction rate with cytochrome c oxidase. The rate constants for (PLP)2-cyt. c, PLP(Lys 86)-cyt. c, PLP(Lys 79)-cyt. c and native cytochrome c (at pH 7.4, I = 0.02) are 3.6 X 10(-3) sec-1, 5.5 X 10(-3) sec-1, 5.2 X 10(-3) sec-1 and 9.8 X 10(-3 ...
M I, Mitovska +2 more
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The kinetics of cytochrome c oxidase I. The system: Cytochrome c-cytochrome oxidase-oxygen
Biochimica et Biophysica Acta, 1961Abstract 1. 1. The kinetics of cytochrome c oxidase were studied in the Keilin and Hartree heart-muscle preparation by measuring the disappearance of reduced cytochrome c spectrophotometrically. The results of Smith and Conrad were confirmed. 2. 2.
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Structure of Cytochrome c Oxidase
1980Cytochrome c oxidase or cytochrome c : oxygen oxidoreductase (CH 1.9.3.1) is the terminal oxidase in respiratory metabolism of all aerobic organisms and is responsible for catalyzing the reduction of dioxygen to water in the reaction: $$ 4{H^ + } + 4{e^ - } + {O_2} \rightleftarrows 2{H_2}O $$ The electrons for this reaction are provided by ...
R A, Capaldi, L, Prochaska, R, Bisson
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Cytochrome c oxidase deficiency
American Journal of Medical Genetics, 2001AbstractCytochrome c oxidase (COX) is the terminal enzyme of the mitochondrial respiratory chain, catalyzing the transfer of electrons from reduced cytochrome c to molecular oxygen. It is composed of 13 structural subunits, three of which are encoded in mtDNA and form the catalytic core of the enzyme.
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2002
Cytochrome oxidase is the terminal oxidase of most of aerobic organisms and reduces molecular oxygen (O2) to water (1). The electrons and protons required for the formation of water molecules are transferred from both sides of the mitochondrial inner membranes in eukaryotic cells and of the cell membrane in prokaryotic cells (1).
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Cytochrome oxidase is the terminal oxidase of most of aerobic organisms and reduces molecular oxygen (O2) to water (1). The electrons and protons required for the formation of water molecules are transferred from both sides of the mitochondrial inner membranes in eukaryotic cells and of the cell membrane in prokaryotic cells (1).
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A study of the kinetics of the oxidation of cytochrome c by cytochrome c oxidase
Archives of Biochemistry and Biophysics, 1956Abstract 1. 1. The kinetics of the oxidation of ferrocytochrome c by cytochrome c oxidase were studied spectrophotometrically by observing the rate of decrease in optical density at the α, β, or γ band of ferrocytochrome c as the reduced cytochrome c is oxidized. 2. 2.
H, CONRAD, L, SMITH
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Cytochrome oxidase, ligands and electrons
Journal of Inorganic Biochemistry, 2005We present hereby an overview of the reactions of cytochrome c oxidase, the terminal enzyme of the mitochondrial respiratory chain, with ligands (primarily oxygen) and electrons, pointing out where necessary unresolved facts or questionable interpretations.
BRUNORI, Maurizio +2 more
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The “oxygenated complex” of cytochrome c oxidase
Biochemical and Biophysical Research Communications, 1972Abstract The conformational effects associated with the oxygenation of reduced cytochrome c oxidase have been investigated by Soret circular dichroism measurements of solutions at pH 7.2 and at 2°. The series of curves with increasing oxygenation indicates the formation of at least one distinct intermediate with an isodichroic point at 439 nm ...
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Proton pumping by cytochrome c oxidase
Nature, 1999Proton pumping by cytochrome c oxidase1 was thought to be restricted to the oxidative part of its catalytic cycle2, but this has been questioned3. New results4 were interpreted as an indication that two protons are pumped during the oxidative phase, and two during a subsequent reductive phase, and that this latter pumping is energetically coupled to ...
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Cytochrome c oxidase: A synopsis
Archives of Biochemistry and Biophysics, 1978M, Erecińska, D F, Wilson
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