Electrometric and Electron Paramagnetic Resonance Measurements of a Difference in the Transmembrane Electrochemical Potential: Photosynthetic Subcellular Structures and Isolated Pigment–Protein Complexes [PDF]
Membranes, 2023 A transmembrane difference in the electrochemical potentials of protons (ΔμH+) serves as a free energy intermediate in energy-transducing organelles of the living cell. The contributions of two components of the ΔμH+ (electrical, Δψ, and concentrational,
Alexey Yu. Semenov +1 more
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Rhodobacter sphaeroides as a model to study the ecotoxicity of 1-alkyl-3-methylimidazolium bromide [PDF]
Frontiers in Molecular Biosciences, 2023 The purple non-sulfur bacterium Rhodobacter sphaeroides was selected as a biological model to investigate its response to the toxicity of 1-alkyl-3-methylimidazolium bromide ([Cnmim]Br), a type of ionic liquid (IL), with different alkyl chain lengths (n ...
Xiao-Lin Liu +5 more
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A photoheterotrophic bacterium from Iceland has adapted its photosynthetic machinery to the long days of polar summer [PDF]
mSystemsDuring their long evolution, anoxygenic phototrophic bacteria have inhabited a wide variety of natural habitats and developed specific strategies to cope with the challenges of any particular environment.
Jürgen Tomasch +7 more
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Trehalose Interferes with the Photosynthetic Electron Transfer Chain of Cereibacter (Rhodobacter) sphaeroides Permeating the Bacterial Chromatophore Membrane. [PDF]
Int J Mol SciDisaccharide trehalose has been proven in many cases to be particularly effective in preserving the functional and structural integrity of biological macromolecules. In this work, we studied its effect on the electron transfer reactions that occur in the chromatophores of the photosynthetic bacterium Cereibacter sphaeroides.
Venturoli G +4 more
europepmc +3 more sources
Thermodynamics and Kinetics of Photophosphorylation in Bacterial Chromatophores and Their Relation with the Transmembrane Electrochemical Potential Difference of Protons [PDF]
FEBS Journal, 1977 The extent of the protonmotive force (transmembrane ΔH+/F) developed in bacterial chromatophores from Rhodopseudomonas capsulata under continous illumination has been determined with measurements of the quenching of 9-aminoacridine fluorescence and the red band shift of carotenoids.
Rita Casadio, B A Melandri
exaly +3 more sources
ΔpH and membrane potential in bacterial chromatophores [PDF]
FEBS Letters, 1974 Shimon Schuldiner +2 more
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IONIC EFFECTS ON THE PHOTOCHEMICAL ACTIVITY OF BACTERIAL CHROMATOPHORES
Proceedings of the National Academy of Sciences of the United States of America, 1963 exaly +4 more sources
THE PREPARATION AND PROPERTIES OF BACTERIAL CHROMATOPHORE FRACTIONS [PDF]
The Journal of Cell Biology, 1964 Chromatophore material from the bacterium Rhodopseudomonas spheroides was freed of ribosomes by centrifugation in 27 per cent RbCl and then separated into "heavy" and "light" fractions by centrifugation through a sucrose gradient. The fractions differed from one another in the following ways.
P B, WORDEN, W R, SISTROM
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Frontiers in Microbiology, 2020 The endosymbiotic acquisition of mitochondria and plastids more than one billion years ago was central for the evolution of eukaryotic life. However, owing to their ancient origin, these organelles provide only limited insights into the initial stages of
Linda Oberleitner +9 more
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Absorption Changes in Bacterial Chromatophores
Biophysical Journal, 1964 The magnitude and kinetics of photo-induced absorption changes in bacterial chromatophores (R. rubrum, R. spheroides and Chromatium) have been studied as a function of potential, established by added redox couples. No photochanges can be observed above +0.55 v or below -0.15 v.
Kuntz, Irwin D. +2 more
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