Results 31 to 40 of about 6,418 (224)

Photocycle dynamics of the Archaerhodopsin 3 based fluorescent voltage sensor Archon2

, 2021
The retinal photocycle dynamics of the fluorescent voltage sensor Archon2 in pH 8 Tris buffer was studied. Archon2 is a mutant of Archaerhodopsin 3 (Arch) from Halorubrum sodomense obtained by a robotic multidimensional directed evolution approach ...
Silapetere, Arita, Penzkofer, Alfons, Hegemann, Peter, Alfons Penzkofer, Arita Silapetere, Peter Hegemann   +5 more
core   +1 more source

Time‐Resolved Multidimensional NMR Spectroscopy Reveals the Bifurcated Folding Pathway of a Thrombin‐Binding DNA G4–Azobenzene Derivative Complex

Angewandte Chemie, EarlyView.
A photoswitchable ligand was used to trigger conformational changes within the thrombin binding aptamer DNA G‐Quadruplex. These reversible ligand driven rearrangements were examined by time‐resolved NMR experiments to gain insight of the dynamic folding landscape of the G‐quadruplex.
Jason Martins, Julia Wirmer‐Bartoschek, Harald Schwalbe   +2 more
wiley   +2 more sources

Gating and ion selectivity of Channelrhodopsins are critical for photo-activated orientation of Chlamydomonas as shown by in vivo point mutation

Nature Communications, 2022
Channelrhodopsin photoreceptors are responsible for phototaxis in C. reinhardtii. Here, authors introduce point mutations in the channel which modify photocycle kinetics and ion selectivity, resulting in a deeper understanding of phototaxis in low light ...
Olga Baidukova, Johannes Oppermann, Simon Kelterborn, Rodrigo G. Fernandez Lahore, Dimitri Schumacher, Heide Evers, Yousef Yari Kamrani, Peter Hegemann   +7 more
doaj   +1 more source

Reply to “Comment on ‘An Apparent General Solution for the Kinetic Models of the Bacteriorhodopsin Photocycle' ”

, 2016
Reply to “Comment on ‘An Apparent General Solution for the Kinetic Models of the Bacteriorhodopsin Photocycle' 
Richard W. Hendler (2532925)
core   +2 more sources

Photocycle of point defects in highly- and weakly-germanium doped silica revealed by transient absorption measurements with femtosecond tunable pump

Scientific Reports, 2022
We report pump-probe transient absorption measurements addressing the photocycle of the Germanium lone pair center (GLPC) point defect with an unprecedented time resolution.
V. De Michele, A. Sciortino, M. Bouet, G. Bouwmans, S. Agnello, F. Messina, M. Cannas, A. Boukenter, E. Marin, S. Girard, Y. Ouerdane   +10 more
doaj   +1 more source

Ion Transport of Biohybrid Asymmetric Membranes by pH and Light‐Cooperative Modulation

Advanced Materials Interfaces, 2020
Bacteriorhodopsin (bR) is an excellent light‐driven proton pump and plays a vital role in chemical and biological analytical processes, such as maintaining osmotic balance, intracellular acidity, and participating in photosynthesis.
Yujia Lv, Nannan Yang, Shanfu Lu, Yan Xiang   +3 more
doaj   +1 more source

Catalytic Enantioselective 6π Photocyclization of Acrylanilides

Journal of the American Chemical Society, 2022
Controlling absolute stereochemistry in catalytic photochemical reactions is generally challenging owing to high rates of background reactivity. Successful strategies broadly rely on selective excitation of the reaction substrate when associated with a chiral catalyst.
Jones, BA, Solon, P, Popescu, MV, Du, J-Y, Paton, R, Smith, MD   +5 more
openaire   +2 more sources

Molecular Activation Mechanism and Structural Dynamics of Orange Carotenoid Protein

Physchem, 2022
Like most photosynthetic organisms, cyanobacteria are vulnerable to fluctuations in light intensity, which can damage their photosynthetic machinery. To protect against this, they use a photoprotective mechanism called non-photochemical quenching (NPQ ...
Volha U. Chukhutsina, Jasper J. van Thor
doaj   +1 more source

PHOTOACOUSTIC CALORIMETRY OF BACTERIORHODOPSIN PHOTOCYCLE

, 1983
Le cycle photochimique de la bactériorhodopsine a été étudié par photolyse par flash et par spectroscopie photoacoustique. Les spectres photoacoustigues de fréquence ont été simulés sur base d'un cycle branché, afin de déterminer les variations d ...
M. Renard, M. Delmelle
core   +1 more source

Integration of light and temperature in the regulation of circadian gene expression in Drosophila. [PDF]

PLoS Genetics, 2007
Circadian clocks are aligned to the environment via synchronizing signals, or Zeitgebers, such as daily light and temperature cycles, food availability, and social behavior.
Catharine E Boothroyd, Herman Wijnen, Felix Naef, Lino Saez, Michael W Young   +4 more
doaj   +1 more source