Results 31 to 40 of about 4,433 (184)
Molecular bases of circadian magnesium rhythms across eukaryotes
FEBS Letters, EarlyView.Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley +1 more source
Double solids, categories and non-rationality
, 2013 This paper suggests a new approach to questions of rationality of threefolds based on category theory. Following M. Ballard, D. Favero, L. Katzarkov (ArXiv:1012.0864) and D. Favero, L.
Iliev, Atanas +2 more
core +1 more source
On some quiver determinantal varieties
Journal of Algebra, 2015 17 pages. V2. Final version to appear in J.
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FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source
Commuting varieties of $r$-tuples over Lie algebras
, 2013 Let $G$ be a simple algebraic group defined over an algebraically closed field $k$ of characteristic $p$ and let $\g$ be the Lie algebra of $G$. It is well known that for $p$ large enough the spectrum of the cohomology ring for the $r$-th Frobenius ...
Baranovsky +31 more
core +1 more source
Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing
FEBS Letters, EarlyView.Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley +1 more source
On higher secant varieties of rational normal scrolls
Le Matematiche, 1996 In this paper we study the higher secant varieties of rational normal scrolls, in particular we give them as determinantal varieties. From this we can obtain, in some cases, the sequence of secant defects, generalizing to a class of varieties and to ...
Pietro De Poi
doaj
Journal of High Energy PhysicsThe CEGM formalism offers a general framework for scattering amplitudes, which rests on Grassmannians, moduli spaces and tropical geometry. The physical implications of this generalization are still to be understood.
Bruno Giménez Umbert, Bernd Sturmfels
doaj +1 more source
Geometric syzygies of elliptic normal curves and their secant varieties
, 2003 We show that the linear syzygy spaces of elliptic normal curves, their secant varieties and of bielliptic canonical curves are spanned by geometric syzygies.Comment: 31 Pages ...
Bothmer, Hans-Christian v., Hulek, Klaus
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Singular Loci of Ladder Determinantal Varieties and Schubert Varieties
Journal of Algebra, 2000 The authors give an interpretation of ``ladder determinantal varieties'' as ``opposite cells'' in a suitable Schubert variety. It is then possible to determine the singular loci of these varieties. This leads to a conjecture on the irreducible components of the singular locus of a Schubert variety in the flag variety.
Gonciulea, N., Lakshmibai, V.
openaire +2 more sources