Results 71 to 80 of about 137,140 (304)
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
Cryptanalysis of optical security systems with significant output images [PDF]
, 2007 The security of the encryption and verification techniques with significant output images is examined by a known-plaintext attack. We introduce an iterative phase-retrieval algorithm based on multiple intensity measurements to heuristically estimate the ...
Guohai Situ +7 more
core +1 more source
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
The Optimum Encryption Method for Image Compressed by AES [PDF]
, 2020 In this paper, the idea of partial encoding has been proposed to use for secure encryption of only a portion of compressed data. Only 10% -25% of the output is encrypted from the Quad tree compression algorithm. As a result, the encryption and decryption
Marwah Kamil Hussein
core
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
QIoTChain: Quantum IoT‐blockchain fusion for advanced data protection in Industry 4.0
IET BlockchainThe modern world has its foundation built on data. Data is generated all the time, and many aspects of the society and economy are built upon it. In today's world, data is employed in better decision‐making, innovation, and improving the efficiency of ...
Aditya Kumar Sharma +3 more
doaj +1 more source
SECURE AND EFFICIENT LIGHTWEIGHT CRYPTOGRAPHIC ALGORITHM FOR RESOURCE-CONSTRAINED IOMT APPLICATIONS: L6AES [PDF]
Proceedings on Engineering SciencesThe Internet of Medical Things has revolutionised patient care through continuous remote monitoring and diagnostics. However, directly applying conventional AES encryption to resource-constrained IoMT devices poses challenges due to high computational ...
Cyrus Mehra , Arvind K. Sharma
doaj +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Web Secure Login Design With Symetric Encription RC-6 Algorithm [PDF]
, 2011 Authentication techniques that use at many web pages and easy to do is use user-id and password. However, these techniques are vulnerable to theft user-id and password when sent from client to server.
Kodrat, Imam Satoto, Arkhan, Subari
core +1 more source
AutomatikaUsers of the cloud have been given access to high-quality, on-demand services, without being concerned about the sustaining infrastructure and software. While increasing the security concerns for private and confidential information, this brings emphasis
D. Deena Rose, C. Agees Kumar
doaj +1 more source