Results 71 to 80 of about 1,642,984 (314)

Pyrophosphate and Irreversibility in Evolution, or why PPi Is Not an Energy Currency and why Nature Chose Triphosphates

Frontiers in Microbiology, 2021
The possible evolutionary significance of pyrophosphate (PPi) has been discussed since the early 1960s. Lipmann suggested that PPi could have been an ancient currency or a possible environmental source of metabolic energy at origins, while Kornberg ...
Jessica L. E. Wimmer, Karl Kleinermanns, William F. Martin   +2 more
doaj   +1 more source

Hydro- Chemical Evolution of Palk Strait Region, Bay of Bengal [PDF]

, 2012
Present analysis was carried out the physico- chemical parameters of two stations such as Thondi and Soliyakudi in the southeast Palk Strait region during the monsoon and post monsoon seasons (November 2008 – March 2009).
Arulpriya, M. (Mani), govindasamy, C. (chinavenkataraman), Meenakshi, V. R. (V), Ruban, P. (Packiasamy)   +3 more
core  

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Life on Minerals: Binding Behaviors of Oligonucleotides on Zirconium Silicate and Its Inhibitory Activity for the Self-Cleavage of Hammerhead Ribozyme

Life, 2022
The role of minerals in the chemical evolution of RNA molecules is an important issue when considering the early stage of the Hadean Earth. In particular, the interaction between functional ribozymes and ancient minerals under simulated primitive ...
Kunio Kawamura, Jean-François Lambert, Louis M. P. Ter-Ovanessian, Jacques Vergne, Guy Hervé, Marie-Christine Maurel   +5 more
doaj   +1 more source

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

Retrocausality in Quantum Phenomena and Chemical Evolution

Information, 2016
The interplay between retrocausality and the time-reversal symmetry of the dynamical law of quantum mechanics underscores the significance of the measurement dynamics with the use of indivisible and discrete quantum particles to be mediated.
Koichiro Matsuno
doaj   +1 more source

Evolution of chemical abundances in Seyfert galaxies

, 2007
We computed the chemical evolution of spiral bulges hosting Seyfert nuclei, based on updated chemical and spectro-photometrical evolution models for the bulge of our Galaxy, made predictions about other quantities measured in Seyferts, and modeled the ...
Adams, Angeletti, Arimoto, Balcells, Baldwin, Ballero, Ballero, Ballero, Barth, Bentz, Bertin, Blain, Bondi, Brandt, Calura, Calura, Calura, Calura, Chiappini, Chiappini, Cimatti, Cioffi, Ciotti, Ciotti, Ciotti, Collin, Cox, Cox, D'Odorico, Di Matteo, Dietrich, Dietrich, Dunlop, Dwek, F. Calura, F. Matteucci, Fabian, Ferrarese, Ferrarese, Fields, Fields, Ford, François, Fraquelli, Freudling, Friaça, Fulbright, Fulbright, Galaz, Gebhardt, Gebhardt, Genzel, González Delgado, Granato, Groenewegen, Gu, Haiman, Hamann, Hamann, Hamann, Hernquist, Ho, Ho, Häring, Itoh, Iwamuro, Iwamuro, Jiang, Jimenez, Jimenez, Kaspi, Komossa, Kormendy, Kurucz, L. Ciotti, Laor, Launhardt, Lecureur, Lee, MacKenty, Magorrian, Maiolino, Maiolino, Marconi, Markowitz, Mathur, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, McLure, Monaco, Nagao, Nagao, Narayan, Nelson, Nomoto, Onken, Origlia, Origlia, Origlia, Ostriker, P. Padovani, Padovani, Peletier, Peletier, Petitjean, Pipino, Rich, Rodríguez-Ardila, Romano, S. K. Ballero, Salpeter, Sazonov, Scannapieco, Schmitt, Shields, Storchi-Bergmann, Storchi-Bergmann, Storchi-Bergmann, Storchi-Bergmann, Thomas, Thomas, Thompson, Tinsley, Tremaine, Turner, Ulrich, Van Loon, Verner, Wandel, Wandel, Wang, Warner, Wills, Wu, Yee, Yu, Zoccali, Zoccali   +141 more
core   +2 more sources

An intracellular transporter mitigates the CO2‐induced decline in iron content in Arabidopsis shoots

FEBS Letters, EarlyView.
This study identifies a gene encoding a transmembrane protein, MIC, which contributes to the reduction of shoot Fe content observed in plants under elevated CO2. MIC is a putative Fe transporter localized to the Golgi and endosomal compartments. Its post‐translational regulation in roots may represent a potential target for improving plant nutrition ...
Timothy Mozzanino, Meijie Li, Cécile Fizames, Mattia Adamo, Laurence Lejay, Christian Dubos, Matthieu Platre, Antoine Martin   +7 more
wiley   +1 more source

Wet-Dry Cycling Delays the Gelation of Hyperbranched Polyesters: Implications to the Origin of Life

Life, 2019
In extant biology, biopolymers perform multiple crucial functions. The biopolymers are synthesized by enzyme-controlled biosystems that would not have been available at the earliest stages of chemical evolution and consist of correctly sequenced and/or ...
Irena Mamajanov
doaj   +1 more source

Chemical Evolution in the Carina Dwarf Spheroidal

, 2004
We present metallicities for 487 red giants in the Carina dwarf spheroidal (dSph) galaxy that were obtained from FLAMES low-resolution Ca triplet (CaT) spectroscopy. We find a mean [Fe/H] of -1.91 dex with an intrinsic dispersion of 0.25 dex, whereas the
Evans, N. W., Gilmore, G. F., Grebel, E. K., Harbeck, D., Kleyna, J. T., Koch, A., Wilkinson, M. I., Wyse, R. F. G.   +7 more
core   +1 more source