Results 101 to 110 of about 1,612,116 (287)
Graph operations and neighbor-integrity [PDF]
Mathematica Bohemica, 2004 Summary: Let \(G\) be a graph. A vertex subversion strategy of \(G\), say \(S\), is a set of vertices in~ \(G\) whose closed neighborhood is removed from~ \(G\). The survival-subgraph is denoted by \(G/S\). The neighbor-integrity of~ \(G\), NI\((G)\), is defined to be NI\((G) = \min _{S \subseteq V (G)} \{| S| + c (G/S)\}\), where~ \(S\) is any vertex ...
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FEBS Letters, EarlyView.Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell +2 more
wiley +1 more source
Integral representations for Padé-type operators
Journal of Applied Mathematics, 2002 The main purpose of this paper is to consider an explicit form of the Padé-type operators. To do so, we consider the representation of Padé-type approximants to the Fourier series of the harmonic functions in the open disk and of the L p-functions on the
Nicholas J. Daras
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‘Guide and Prejudice’— How Argonautes recognize targets across domains of life
FEBS Letters, EarlyView.Argonaute proteins use short nucleic‐acid guides to locate and regulate specific targets across all domains of life. Despite striking diversity—from human gene silencing to bacterial immune defence—all Argonautes share a conserved three‐stage recognition logic: guide‐directed sampling, progressive target pairing with a conformational checkpoint and ...
Jack P. K. Bravo
wiley +1 more source
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Grüss' Type Inequalities for Functions of Selfadjoint Operators in Hilbert Spaces [PDF]
, 2008 Some inequalities of Grüss’ type for functions of selfadjoint operators in Hilbert spaces, under suitable assumptions for the involved operators, are ...
Dragomir, Sever S
core +3 more sources
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source
On Positive Definite Kernels of Integral Operators Corresponding to the Boundary Value Problems for Fractional Differential Equations. [PDF]
Entropy (Basel), 2022 Aleroev M, Aleroev T.
europepmc +1 more source
Learning Contractive Integral Operators with Fredholm Integral Neural Operators
CoRRWe generalize the framework of Fredholm Neural Networks, to learn non-expansive integral operators arising in Fredholm Integral Equations (FIEs) of the second kind in arbitrary dimensions. We first present the proposed Fredholm Integral Neural Operators (FREDINOs), for FIEs and prove that they are universal approximators of linear and non-linear ...
Kyriakos Georgiou +2 more
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