Results 91 to 100 of about 5,378,638 (296)

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

open access: yesFEBS 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

Differential expansion for link polynomials

open access: yes, 2017
The differential expansion is one of the key structures reflecting group theory properties of colored knot polynomials, which also becomes an important tool for evaluation of non-trivial Racah matrices.
Bai, C.   +6 more
core   +2 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

open access: yesFEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva   +10 more
wiley   +1 more source

Associations between herd size, rate of expansion and production, breeding policy and reproduction in spring-calving dairy herds

open access: yesAnimal, 2011
Dairy herd size is expected to increase in many European countries, given the recent policy changes within the European Union. Managing more cows may have implications for herd performance in the post-quota era.
J.G. Jago, D.P. Berry
doaj   +1 more source

Le langage dans les pratiques doctrinaires en Amérique : le cas du concept de frontière [PDF]

open access: yesAkofena, 2022
La manipulation du langage au profit des ambitions stratégiques de l’Amérique a toujours été le levier essentiel qui a permis aux Etats-Unis de se construire et de s’idéaliser, faisant ainsi de l’Amérique une nation exceptionnelle. La notion de frontière
Mamadou Malal SY
doaj  

Expansive automata networks

open access: yesTheoretical Computer Science, 2020
An Automata Network is a map ${f:Q^n\rightarrow Q^n}$ where $Q$ is a finite alphabet. It can be viewed as a network of $n$ entities, each holding a state from $Q$, and evolving according to a deterministic synchronous update rule in such a way that each entity only depends on its neighbors in the network's graph, called interaction graph. A major trend
Bridoux, Florian   +2 more
openaire   +4 more sources

Cell wall target fragment discovery using a low‐cost, minimal fragment library

open access: yesFEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan   +5 more
wiley   +1 more source

Parameter Expansion and Efficient Inference

open access: yes, 2010
This EM review article focuses on parameter expansion, a simple technique introduced in the PX-EM algorithm to make EM converge faster while maintaining its simplicity and stability.
Lewandowski, Andrew   +2 more
core   +2 more sources

Bantu expansion

open access: yesThe Encyclopedia of Ancient History: Asia and Africa, 2023
The Bantu expansion is the initial spread of the Bantu languages and the people speaking them from their original homeland in the border zone of modern‐day Nigeria and Cameroon over major parts of eastern and central Africa. This entry reviews the key evidence from historical linguistics, evolutionary genetics, and archaeology for this major demic ...
openaire   +2 more sources

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

open access: yesFEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee   +3 more
wiley   +1 more source

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