Results 111 to 120 of about 4,043,219 (290)

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

Cassini observations of the thermal plasma in the vicinity of Saturn's main rings and the F and G rings [PDF]

, 2005
The ion mass spectrometer on Cassini detected enhanced ion flux near Saturn's main rings that is consistent with the presence of atomic and molecular oxygen ions in the thermal plasma.
Fish, BA, Crary, FJ, Thomsen, MF, Baragiola, RA, Coates, AJ, Young, DT, Delapp, DM, Francis, MF, Reisenfeld, DB, Kurth, WS, Johnson, RE, Gurnett, DA, Tokar, RL   +12 more
core  

The cohomology of λ-rings and ψ-rings

, 2010
In this thesis we develop the cohomology of diagrams of algebras and then apply this to the cases of the λ-rings and the ψ-rings. A diagram of algebras is a functor from a small category to some category of algebras.
Michael Robinson (2123074)
core   +4 more sources

حول حلقات المنتظمة بضعف -n

Al-Rafidain Journal of Computer Sciences and Mathematics, 2012
Raida D. Mahammod, Mohammed Th. Al-Neimi
doaj   +1 more source

KINEMATIC ANALYSIS OF CROSS ON TRAINING AND COMPETITION RINGS: COMPARISON BETWEEN ELITE AND INTERNATIONAL LEVEL GYMNASTS

Science of Gymnastics Journal
Auxiliary devices are used to train gymnastics skills. Based on the principles of training specificity, this study aimed to investigate the effectiveness of a training device for the static cross posture on Men’s Artistic Gymnastics rings through ...
Paulo Daniel Sabino Carrara, Gareth Irwin, Timothy Exell, Julio Cerca Serrão, Alberto Carlos Amadio, Luis Mochizuki   +5 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

Non-reduced valuation rings and descent for smooth blowup squares [PDF]

We consider a class of non-reduced valuation rings, known in the literature as chain rings. We observe that the Grothendieck topology generated by the Zariski topology and smooth blowup squares is exactly the topology which has chain rings for its local ...
Kelly, Shane
core   +1 more source

حول الحلقات النتظمة بضعف من النمط sπ

Al-Rafidain Journal of Computer Sciences and Mathematics, 2008
Raida D. Mahmood, Abdullah M. Abdul-Jabbar   +1 more
doaj   +1 more source

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

الحلقات التی فیها کل مقاس بسیط ایمن مسطح

Al-Rafidain Journal of Computer Sciences and Mathematics, 2004
Raida D. Mahmood
doaj   +1 more source