Results 91 to 100 of about 683,598 (277)

Universally catenarian integral domains

Advances in Mathematics, 1988
The authors study (not necessarily Noetherian) integral domains R that have the property that the polynomial ring \(R[X_ 1,...,X_ n]\) is catenarian for each positive \(integer n\). Such domains are said to be universally catenarian. It is proved that a domain R with this property is a stably strong S-domain in the sense of \textit{S.
BOUVIER A, DOBBS DE, FONTANA, Marco
openaire   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Evolutionary equation of inertial waves in 3-D multiply connected domain with Dirichlet boundary condition

International Journal of Mathematics and Mathematical Sciences, 2001
We study initial-boundary value problem for an equation of composite type in 3-D multiply connected domain. This equation governs nonsteady inertial waves in rotating fluids.
Pavel A. Krutitskii
doaj   +1 more source

Conducive integral domains as pullbacks

Manuscripta Mathematica, 1986
A ''conducive domain'' is a (commutative unitary integral) domain R, with quotient field F, such that for every overring T of R, \(R\subseteq T\subsetneqq F\), the conductor \((R:T)=\{x\in F;\quad xT\subseteq R\}\) is nonzero [cf. \textit{E. Bastida} and \textit{R. Gilmer}, Mich. Math. J. 20, 79- 95 (1973; Zbl 0239.13001) and \textit{D. E.
BARUCCI, Valentina, D. Dobbs, M. Fontana
openaire   +4 more sources

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

Commutative Algebras of Ordinary Differential Operators with Matrix Coefficients

, 1996
A classification of commutative integral domains consisting of ordinary differential operators with matrix coefficients is established in terms of morphisms between algebraic curves.Comment: AMS-TeX format, 16 ...
Kimura, Masato, Mulase, Motohico
core   +1 more source

A novel approach to nonlinear fractional volterra integral equations

Acta Polytechnica
Nonlinear Fractional Volterra integral equations (FVIEs) of the first kind present challenges due to their intricate nature, combining fractional calculus and integral equations.
Mohammed Abdulshareef Hussein, Hassan Kamil Jassim   +1 more
doaj   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source