Results 81 to 90 of about 17,700,714 (250)

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

Fully non-linear simulation of second-order resonance in a three-dimensional tank using the PSME method [PDF]

, 2012
Sloshing occurs when a partially filled tank is subject to external excitation. If the excitation frequency is equal to half of the second-order natural frequency obtained from the linear theory, then second-order resonance may occur.
Borthwick, Alistair G. L., Chern, Ming-Jyh, Vaziri, Nima   +2 more
core   +1 more source

Asymptotic behavior of second-order impulsive differential equations

Electronic Journal of Differential Equations, 2011
In this article, we study the asymptotic behavior of all solutions of 2-th order nonlinear delay differential equation with impulses. Our main tools are impulsive differential inequalities and the Riccati transformation.
Haifeng Liu, Qiaoluan Li
doaj  

Defining Second-Order Desert [PDF]

Organon F
Philosophers who work on desert-adjustment within axiology often articulate the concept of desert as follows: x deserves y on the basis of z. This formulation allows for a focused examination that encompasses deservers, deservings, and desert bases.
Beşir Özgür Nayır
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

Oscillatory behavior of solutions of second-order non-linear differential equations with mixed non-linear neutral terms

Frontiers in Applied Mathematics and Statistics
This study primarily seeks to expand upon these developments by encompassing neutral differential equations of mixed type, incorporating both delay and advanced terms, particularly in the case of the canonical operator.
Ahmed M. Hassan, Osama Moaaz, Osama Moaaz, Sameh S. Askar, Ahmad M. Alshamrani   +4 more
doaj   +1 more source

Second-Order Management – How Second-Order Concepts Contribute to Solutions within Complex Environments [PDF]

Journal of Systemics, Cybernetics and Informatics, 2020
In our daily practice as management consultants we observe disorientation, misconceptions, and open questions about the suitability, limitations, and/or benefits of novel management approaches.
Philipp Belcredi, Tilia Stingl de Vasconcelos Guedes   +1 more
doaj  

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source

Int. Sig. Proc. Workshop on Higher Order Statistics, Chamrouse, France, July 1991.

, 2007
Direction finding techniques are usually based on the 2ndorder statistics of the received data. In this paper, we propose a MUSIC-like direction finding algorithm which uses a matrix-valued statistic based on the contraction of the 4thorder cumulant ...
Second-Order Versus Fourth-Order
core