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Phycobilisomes (PBS) are the major light-harvesting, protein–pigment complexes in cyanobacteria and red algae. PBS absorb and transfer light energy to photosystem (PS) II as well as PS I, and the distribution of light energy from PBS to the two photosystems is regulated by light conditions...
This review focuses on phylloquinone as an indispensable link between light-induced charge separation and subsequent charge stabilization in Photosystem I (PS I). Here, the role of the polypeptide in conferring the necessary kinetic and thermodynamic properties to phylloquinone so as to specify...
The main focus of this investigation is steady state kinetics of regulation of mitochondrial respiration in permeabilized cardiomyocytes in situ. Complete kinetic analysis of the regulation of respiration by mitochondrial creatine kinase was performed in the presence of pyruvate kinase and...
Previous work has shown that the essential R210 of subunit a in the Escherichia coli ATP synthase can be switched with a conserved glutamine Q252 with retention of a moderate level of function, that a third mutation P204T enhances this function, and that the arginine Q252R can be replaced by...
125 I-labeled ( t rifluoromethyl)phenyl d iazirinyl a cetogenin, ( 125 I)TDA, a photoaffinity labeling probe of acetogenin, photo-cross-links to the ND1 subunit of bovine heart mitochondrial NADH–ubiquinone oxidoreductase (complex I) with high specificity ( M. Murai, A. Ishihara, T. Nishioka,...
Choline is a quaternary amino cationic organic alcohol that is oxidized to betaine in liver and kidney mitochondria. Betaine acts as an intracellular organic osmolyte in the medulla of the kidney. Evidence is provided that kidney mitochondria have a choline transporter in their inner membrane....
Photosynthesis involves the conversion of light into chemical energy through a series of electron transfer reactions within membrane-bound pigment/protein complexes. The Photosystem II (PSII) complex in plants, algae and cyanobacteria catalyse the oxidation of water to molecular O 2 . The...
We have examined the network of connected internal cavities in cytochrome c oxidase along which water produced at the catalytic center is removed from the enzyme. Using combination of structural analysis, molecular dynamics simulations, and free energy calculations we have identified two exit...
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