Results 141 to 150 of about 876,778 (355)

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Are beryllium abundances anomalous in stars with giant planets?

, 2004
In this paper we present beryllium (Be) abundances in a large sample of 41 extra-solar planet host stars, and for 29 stars without any known planetary-mass companion, spanning a large range of effective temperatures.
A. Ecuvillon, Anders, Barnes, Bodaghee, Boesgaard, Boesgaard, Boesgaard, C. Domínguez Cerdeña, Chmielewski, Deliyannis, Deliyannis, Ecuvillon, Edwards, Feigelson, Flower, G. Israelian, García López, García López, García López, Gonzalez, Gonzalez, Gonzalez, Gonzalez, Goodman, Grevesse, Hartmann, Isobe, Israelian, Israelian, Israelian, Laughlin, Laws, Laws, Lejeune, M. Mayor, Molaro, Murray, N. C. Santos, Naef, Pinsonneault, Pinsonneault, R. J. García López, R. Rebolo, Randich, Rebolo, Rebull, Rebull, Reddy, Reid, Ryan, S. Randich, Sadakane, Santos, Santos, Santos, Santos, Santos, Santos, Santos, Sari, Siess, Smith, Soderblom, Stassun, Stephens, Strom, Vauclair, Wolff   +67 more
core   +1 more source

Plasmodium falciparum gametogenesis essential protein 1 (GEP1) is a transmission‐blocking target

FEBS Letters, EarlyView.
This study shows Plasmodium falciparum GEP1 is vital for activating sexual stages of malarial parasites even independently of a mosquito factor. Knockout parasites completely fail gamete formation even when a phosphodiesterase inhibitor is added. Two single‐nucleotide polymorphisms (V241L and S263P) are found in 12%–20% of field samples.
Frederik Huppertz, Milagros Siebeck Caturelli, Lina S. Lehmann, Florian Kurth, Alexander G. Maier, Kai Matuschewski   +5 more
wiley   +1 more source

Stellar Ancestry Unlocked: Chemical and Orbital Clues Link Metal-poor Stars to Globular Clusters and the Galaxy’s Thick Disk

The Astronomical Journal
This study presents a detailed chemical, kinematic, and orbital dynamic analysis of five metal-poor stars in the solar neighborhood: HD 2665, HD 5916, HD 122956, HD 189349, and HD 218857.
Gizay Yolalan, Timur Şahin, Selçuk Bilir, Olcay Plevne   +3 more
doaj   +1 more source

Biophysical analysis of angiotensin II and amyloid‐β cross‐interaction in aggregation and membrane disruption

FEBS Letters, EarlyView.
Angiotensin II (AngII), a neuropeptide, interacts with amyloid‐β (Aβ), a key player in Alzheimer's disease. This study reveals that AngII reduces Aβ aggregation and membrane disruption in vitro. Biophysical assays and molecular modeling suggest AngII binds disordered Aβ forms, potentially modulating early amyloidogenic events and contributing to ...
Mohsen Habibnia, Eric Catalina‐Hernandez, Maialen Cabrerizo‐Idiazabal, Ramon Barnadas‐Rodríguez, Mario Lopez‐Martin, Alex Peralvarez‐Marin   +5 more
wiley   +1 more source

The Sun Remains Relatively Refractory Depleted: Elemental Abundances for 17,412 Gaia RVS Solar Analogs and 50 Planet Hosts

The Astrophysical Journal
The element abundances of stars, particularly the refractory elements (e.g., Fe, Si, and Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not have refractory abundance measurements since obtaining a large sample of
Rayna Rampalli, Melissa K. Ness, Graham H. Edwards, Elisabeth R. Newton, Megan Bedell   +4 more
doaj   +1 more source

Mitochondrial fatty acid oxidation is stimulated by red light irradiation

FEBS Letters, EarlyView.
Light at different wavelengths has distinct effects on keratinocyte viability and metabolism. UVA light abrogates metabolic fluxes. Blue and green light have no effect on metabolic fluxes, while red light enhanced oxidative phosphorylation by promoting fatty acid oxidation. Keratinocytes are the primary constituents of sunlight‐exposed epidermis.
Manuel Alejandro Herrera, Camille C. Caldeira da Silva, Maiza Von Denz, Mauricio S. Baptista, Alicia J. Kowaltowski   +4 more
wiley   +1 more source

Cosmic abundances: The impact of stellar duplicity

, 2004
The mass-transfer scenario links chemical peculiarities with stellar duplicity for an increasing number of stellar classes (classical and dwarf barium stars, subgiant and giant CH stars, S stars without technetium, yellow symbiotic stars, WIRRING stars ...
Jorissen, A., Van Eck, S.
core   +1 more source

Metal-enriched Pair-instability Supernovae: Effects of Rotation

The Astrophysical Journal
In this paper, we revisit metal-enriched rotating pair-instability supernovae (PISNe) models for metallicities consistent with the Small Magellanic Cloud, the Large Magellanic Cloud (LMC), and 0.1 Z _⊙ .
Hideyuki Umeda, Chris Nagele
doaj   +1 more source

Stellar abundances of early-type galaxies [PDF]

, 2008
It is currently impossible to determine the abundances of stellar populations star-by-star in dense stellar systems more distant than a few megaparsecs. Therefore, methods to analyse the composite light of stellar systems are required. I review recent progress in determining the abundances and abundance ratios of early-type galaxies.
openaire   +3 more sources