Results 81 to 90 of about 45,393 (304)
An isoform of 14‐3‐3 protein regulates transbilayer lipid movement at the plasma membrane
FEBS Letters, EarlyView.Loss of 14‐3‐3ζ in CHO cells confers resistance to exogenous phosphatidylserine (PS) and impairs endocytosis‐independent inward flip‐flop of fluorescent PS at the plasma membrane. RNAi‐mediated knockdown reproduces this defect, while no additive effect is seen in ATP11C‐deficient cells.
Akiko Yamaji‐Hasegawa +3 more
wiley +1 more source
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
openaire +1 more source
A construction for partially ordered sets
Discrete Mathematics, 1980 AbstractA construction I(S) is defined which corresponds to the intuitive notion of the set of places in which new elements can be inserted into a given poset S. It is given the minimal possible ordering. It turns out that if the base sets are chains the construction produces the corresponding interval orders.
openaire +1 more source
FEBS Letters, EarlyView.Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley +1 more source
An inequality for partially ordered sets
Journal of Combinatorial Theory, Series A, 1990 The pair of (P,f) is called a real partially ordered set if P is a partially ordered set and f: \(P\to {\mathbb{R}}^+\) is a function from P to the positive real numbers. For a subset \(T\subseteq P\) define \(Id^ f(P)=\sum \{f(I):\) I ideal and \(T\subseteq I\}\).
openaire +1 more source
FEBS Letters, EarlyView.Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil +4 more
wiley +1 more source
n–ary hyperstructures constructed from binary quasi–ordered semigroups
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014 Based on works by Davvaz, Vougiouklis and Leoreanu-Fotea in the field of n–ary hyperstructures and binary relations we present a construction of n–ary hyperstructures from binary quasi-ordered semigroups.
Novák Michal
doaj +1 more source
FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
wiley +1 more source
پژوهشهای ریاضی, 2021 For an f-ring with bounded inversion property, we show that , the set of all basic z-ideals of , partially ordered by inclusion is a bounded distributive lattice.
Ali Taherifar
doaj
The morphology of partially ordered sets
Journal of Combinatorial Theory, Series A, 1974 DEFINITION. XC gn is called a set of incomparable elements if A, B E X and A C B imply A = B. Then Sperner’s Theorem -maxx / X 1 = (,J,,), where X ranges over all sets of incomparable elements in .?3,, . The standard proof of Sperner’s theorem (see Harper-Rota [lo]) is based upon two properties of an , unimodality and matching.
openaire +1 more source