Results 61 to 70 of about 679,842 (277)
Matroids on Partially Ordered Sets
Advances in Applied Mathematics, 1998 The concept of a matroid is known to be a fundamental concept in combinatorics and it is also known to be ubiquitous in mathematics in general (e.g., stratification of Grassmanians, arrangements of hyperplanes, optimization). In the literature there exist attempts to generalize this concept.
Barnabei, Marilena +2 more
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Distributive partially ordered sets [PDF]
Fundamenta Mathematicae, 1984 The authors investigate distributive lower (i.e. meet-) semilattices: defined so that the meet is distributive over all existing joins. They generalize the results of \textit{W. H. Cornish} and \textit{R. C. Hickman} [Acta Math. Acad. Sci. Hung. 32, 5-16 (1978; Zbl 0497.06005)], to some extent.
Hickman, R. C., Monro, G. P.
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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
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
FEBS Letters, EarlyView.Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman +2 more
wiley +1 more source
FEBS Letters, EarlyView.This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva +5 more
wiley +1 more source
International Journal of Mathematics and Mathematical Sciences, 2004 An incidence algebra of a nonlocally finite partially ordered set Q is a very rare concept, perhaps nonexistent. In this note, we will attempt to construct such an algebra.
Boniface I. Eke
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Partially homogeneous partially ordered sets
Journal of Combinatorial Theory, Series A, 1993 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Saracino, Dan, Wood, Carol
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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
Birkhoff's order-convergence in partially ordered sets
Topology and its Applications, 2016 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sun, Tao, Li, Qingguo, Guo, Lankun
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