Results 51 to 60 of about 464,016 (298)

Inelastic diffractive scattering in nonperturbative QCD [PDF]

, 2000
We examine diffractive proton-proton scattering p p -> p X and photo- and electroproduction of \rho^0 mesons \gamma^(*) p -> \rho^0 X, where X denotes a proton or a final state, into which the proton can go by diffractive dissociation. Using a functional
Dosch, H. G., Nachtmann, O., Paulus, T., Weinstock, S.   +3 more
core   +4 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Density Functional Study of Intramolecular Proton Transfer Processes in Dithiophene Ethylene Dye Photoluminescence

Medžiagotyra
Dithienylethylene-based photochromic dyes, featuring excellent thermal stability, fatigue resistance, and rapid response, have drawn significant interest.
Jing Huang, Zhifei Zhu, Huirong Huang, Xinbin Liu, Qian Wang   +4 more
doaj   +1 more source

The influence of Fermi motion on the comparison of the polarization transfer to a proton in elastic e→p and quasi-elastic e→A scattering

Physics Letters B, 2019
A comparison between polarization-transfer to a bound proton in quasi-free kinematics by the A(e→,e′p→) knockout reaction and that in elastic scattering off a free proton can provide information on the characteristics of the bound proton. In the past the
S. Paul, T. Brecelj, H. Arenhövel, P. Achenbach, A. Ashkenazi, J. Beričič, R. Böhm, D. Bosnar, E.O. Cohen, L. Debenjak, M.O. Distler, A. Esser, I. Friščić, R. Gilman, D. Izraeli, T. Kolar, I. Korover, J. Lichtenstadt, I. Mardor, H. Merkel, D.G. Middleton, M. Mihovilovič, U. Müller, M. Olivenboim, E. Piasetzky, J. Pochodzalla, G. Ron, B.S. Schlimme, M. Schoth, F. Schulz, C. Sfienti, S. Širca, S. Štajner, S. Strauch, M. Thiel, A. Tyukin, A. Weber, I. Yaron   +37 more
doaj   +1 more source

Polyvinylimidazole-wrapped Halloysite Nanotubes for High Proton Conductivity in Polymer Electrolyte Membranes

International Journal of Electrochemical Science, 2020
The construction of continuous proton transfer channels within a proton exchange membrane is an important and challenging task for the logical design of proton exchange membranes. Herein, inspired by the mechanism of moisture transport used by plants and
Xiaoyang Liu, Xiang Sun, Hongqian Ren, Mengjie Yang, Mingling Xia, Jinghe Hou, Yi Feng, Huili Ding   +7 more
doaj   +1 more source

pH‐mediated activation of the lysosomal arginine sensor SLC38A9

FEBS Letters, EarlyView.
Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
wiley   +1 more source

8-(Pyridin-2-yl)quinolin-7-ol and Beyond: Theoretical Design of Tautomeric Molecular Switches with Pyridine as a Proton Crane Unit

Chemistry
Long-range proton transfer in several conjugated proton cranes, originating from 7-hydroxy quinoline as a proton transfer platform, has been investigated theoretically by means of DFT and TD-DFT methodology.
Lidia Zaharieva, Daniela Nedeltcheva-Antonova, Liudmil Antonov   +2 more
doaj   +1 more source

Proton-Binding Motifs of Membrane-Bound Proteins: From Bacteriorhodopsin to Spike Protein S

Frontiers in Chemistry, 2021
Membrane-bound proteins that change protonation during function use specific protein groups to bind and transfer protons. Knowledge of the identity of the proton-binding groups is of paramount importance to decipher the reaction mechanism of the protein,
Ana-Nicoleta Bondar
doaj   +1 more source

dUTPase is essential in zebrafish development and possesses several single‐nucleotide variants with pronounced structural and functional consequences

FEBS Open Bio, EarlyView.
dUTPases are involved in balancing the appropriate nucleotide pools. We showed that dUTPase is essential for normal development in zebrafish. The different zebrafish genomes contain several single‐nucleotide variations (SNPs) of the dut gene. One of the dUTPase variants displayed drastically lower protein stability and catalytic efficiency as compared ...
Viktória Perey‐Simon, Angéla Békesi, Latifa Kazzazy, Jázmin Mihály, Máté Varga, Beáta G. Vértessy, Kinga Nyíri   +6 more
wiley   +1 more source

Ab initio Molecular Dynamics Study of Glycine Intramolecular Proton Transfer in Water

, 2005
We use ab initio molecular dynamics simulations to quantify structural and thermodynamic properties of a model proton transfer reaction that converts a neutral glycine molecule, stable in the gas phase, to the zwitterion that predominates in aqueous ...
Leung, Kevin, Rempe, Susan B.
core   +1 more source