Search for dissertations about: "proton-pumping mechanism"
Showing result 1 - 5 of 16 swedish dissertations containing the words proton-pumping mechanism.
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1. Energy Transduction and Sensory Signalling in Haloarchaea Structural Characterisation of the Photocycles of Bacteriorhodopsin and Sensory Rhodopsin II
Abstract : Archaeal rhodopsins belong a subfamily of heptahelical transmembrane proteins. All contain a buried retinal chromophore covalently bound to a conserved lysine residue in helix G via a protonated Schiff base. READ MORE
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2. The proton pumping inorganic pyrophosphatase from Rhodospirillum rubrum
Abstract : The aim of the present investigation was to study the mechanism by which light-energy is transformed to biologically useful chemical-energy in the form of inorganic pyrophosphate (PPi). The study was performed on chromatophores (subcellular membrane structures) from the photosynthetic nonsulphur bacterium Rhodospiri Hum rubrum. READ MORE
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3. Proton, Electron, and O2 transfer in Cytochrome c Oxidase
Abstract : In mitochondria and aerobic bacteria energy conservation involves electron transfer through the membrane-bound protein of the respiratory chain to oxygen. Cytochrome c oxidase (CcO) catalyzes the reduction of oxygen to water. Part of the energy released in this reaction is used to pump protons across the membrane. READ MORE
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4. Structure and Function of Cytochrome c Oxidase
Abstract : Aerobic organisms, ranging from bacteria to humans, obtain their energy through the process of respiration. Electrons from the breakdown of food are transported through the membrane-bound enzyme complexes of the respiratory chain, to the terminal acceptor molecule, oxygen. READ MORE
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5. Choreography of a proton pump : Studies of charge-transfer reactions in cytochrome c oxidase
Abstract : In the last step of cellular respiration, electrons from metabolites are transferred to molecular oxygen, mediated by the enzyme complexes of the respiratory chain. Some of these enzyme complexes couple these redox reactions to formation of an electrochemical proton gradient across the cell membrane. The proton gradient is used e.g. READ MORE