Results 41 to 50 of about 4,755,611 (236)
Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation
FEBS Letters, EarlyView.Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe +3 more
wiley +1 more source
Linear maps preserving orbits [PDF]
Annales de l'Institut Fourier, 2012 Let H⊂GL(V) be a connected complex reductive group where V is a finite-dimensional complex vector space. Let v∈V and let G={g∈ GL (V)∣gHv=Hv}. Following Raïs we say that the orbit Hv is characteristic for H if the identity component of G is H. If H is semisimple, we say that Hv is semi-characteristic for H if the identity component of G is an extension
openaire +2 more sources
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
Symmetry Transformations on the Set of Tensor Products of Rank-1 Idempotents
Journal of MathematicsWe obtain a characterization of bijective maps preserving the trace of products on the set of tensor products of rank-1 idempotents, which may be considered as a generalization of Molnár’s Wigner-type theorem in multipartite systems.
Yulong Tian, Jinli Xu
doaj +1 more source
Normal-preserving linear transformations
Linear Algebra and its Applications, 1992 The linear transformations on \(M_ n(\mathbb{C})\) which preserve normal matrices are described.
Kunicki, Catherine M., Hill, Richard D.
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Linear preservers of row-dense matrices [PDF]
Czechoslovak Mathematical Journal, 2016 The authors deal with linear preserves problems of row-dense matrices. A rectangular matrix \(A\) is row-dense if there are no zeros between two nonzero entries in its rows. Furthermore \(A\) is a column-dense matrix if \(A^T\) is row-dense. The structure of linear functions \(T:M_{m,n}\mapsto M_{m,n}\) that preserve or strongly preserve row-dense ...
Motlaghian, Sara M. +2 more
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Multiple ETS family transcription factors bind mutant p53 via distinct interaction regions
FEBS Letters, EarlyView.Mutant p53 gain‐of‐function is thought to be mediated by interaction with other transcription factors. We identify multiple ETS transcription factors that can bind mutant p53 and found that this interaction can be promoted by a PXXPP motif. ETS proteins that strongly bound mutant p53 were upregulated in ovarian cancer compared to ETS proteins that ...
Stephanie A. Metcalf +6 more
wiley +1 more source
Journal of Mathematical Analysis and Applications, 2018 Complete characterizations of left or right symmetric points for (strong) Birkhoff orthogonality in von Neumann algebras and abelian unital C ⁎ -algebras are given.
N. Komuro, K. Saito, Ryotaro Tanaka
semanticscholar +1 more source
Spectrum-preserving linear maps
Journal of Functional Analysis, 1986 Let X and Y be Banach spaces. A linear map \(\phi\) : \({\mathcal B}(X)\to {\mathcal B}(Y)\) is called spectrum-preserving if for every operator \(T\in {\mathcal B}(X)\) we have \(\sigma (\phi (T))=\sigma (T)\), where \(\sigma\) denotes the spectrum. We show that a spectrum-preserving surjective linear map \(\phi\) is either of the form \(\phi (T)=ATA^{
Jafarian, Ali A, Sourour, A.R
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In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
wiley +1 more source