Results 111 to 120 of about 21,693,337 (313)

Emerging experimental and computational methods for studying redox‐regulated structural transitions

FEBS Letters, EarlyView.
Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass, Dana Reichmann, Gábor Erdős   +2 more
wiley   +1 more source

A Second Visit to Eps Ind Ab with JWST: New Photometry Confirms Ammonia and Suggests Thick Clouds in the Exoplanet Atmosphere of the Closest Super-Jupiter

The Astrophysical Journal Letters
With JWST, we are directly imaging cold (∼200–300 K) solar-age giant exoplanets for the first time. At these temperatures, many molecular features appear, and water-ice clouds may condense and affect the emission spectrum; early photometric measurements ...
Elisabeth C. Matthews, James Mang, Aarynn L. Carter, Mathlide Mâlin, Caroline V. Morley, Bhavesh Rajpoot, Leindert A. Boogaard, Jennifer A. Burt, Ian J. M. Crossfield, Fabo Feng, Anne- Marie Lagrange, Mark W. Phillips   +11 more
doaj   +1 more source

An efficient super-resolution approach for obtaining isotropic 3-D imaging using 2-D multi-slice MRI

Egyptian Informatics Journal, 2013
An approach for obtaining both a high-resolution and high-contrast 3D MRI image volume, desirable for image-guided minimally invasive brain surgery, is proposed. Current MRI imaging techniques, especially in situations where contrast requirements dictate
Alaa A. Hefnawy
doaj   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

Efficient Exoplanet Imaging Simulations of the Habitable Worlds Observatory

The Astronomical Journal
Direct imaging simulations of starshades and other proposed mission concepts are needed to characterize planet detection performance and inform mission design trades.
Jamila S. Taaki, Farzad Kamalabadi, Athol J. Kemball, Lia Corrales, Alfred O. Hero III   +4 more
doaj   +1 more source

Ultra-low contrast coronary angiography and zero-contrast percutaneous coronary intervention for prevention of contrast-induced nephropathy: step-by-step approach and review

Advances in Interventional Cardiology, 2019
Contrast-induced nephropathy is a serious complication after intravascular administration of iodinated contrast media and is associated with numerous adverse outcomes.
Jerzy Sacha, Marek Gierlotka, Piotr Feusette, Dariusz Dudek   +3 more
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

CoronaGraph Instrument Reference Stars for Exoplanets (CorGI-REx). I. Preliminary Vetting and Implications for the Roman Coronagraph and Habitable Worlds Observatory

The Astronomical Journal
The upcoming Roman Coronagraph will be the first high-contrast instrument in space capable of high-order wave front sensing and control technologies, a critical technology demonstration for the proposed Habitable Worlds Observatory (HWO) that aims to ...
Justin Hom, Schuyler G. Wolff, Catherine A. Clark, David R. Ciardi, Sarah J. Deveny, Steve B. Howell, Alexandra Z. Greenbaum, Colin Littlefield, Ramya M. Anche, Vanessa P. Bailey, Wolfgang Brandner, Gaël Chauvin, Julien H. Girard, Brian Kern, Eric Mamajek, Bertrand Mennesson, Dmitry Savransky, Karl R. Stapelfeldt, Beth A. Biller, Marah Brinjikji, Masayuki Kuzuhara, Maxwell A. Millar-Blanchaer, Toshiyuki Mizuki, Nicholas T. Schragal, Macarena C. Vega-Pallauta, Jason J. Wang, Robert J. De Rosa, Ewan S. Douglas, Bruce Macintosh, Jingwen Zhang, The Roman Coronagraph Community Participation Program   +30 more
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

A MIRI Search for Planets and Dust around WD 2149+021

The Astronomical Journal
The launch of JWST has ushered in a new era of high-precision infrared astronomy, allowing us to probe nearby white dwarfs for cold dust, exoplanets, and tidally heated exomoons.
Sabrina Poulsen, John Debes, Misty Cracraft, Susan E. Mullally, William T. Reach, Mukremin Kilic, Fergal Mullally, Loic Albert, Katherine Thibault, J. J. Hermes, Thomas Barclay, Elisa V. Quintana   +11 more
doaj   +1 more source