Results 61 to 70 of about 57,217 (289)
Frontiers in Dental MedicineIntroductionThis ex vivo study compared the shaping ability of three nickel-titanium (NiTi) rotary systems in distolingual (DL) canals using 3D-printed three-rooted mandibular first molar (3RM1) replicas.Materials and methodsTwo extracted 3RM1s with DL ...
Bingbing Bai +5 more
doaj +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
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
FReDi : Flexible Replicas Displacer
, 2006 International audienceWe present in this article a flexible management system for dynamic placement of content replicas. It is able to satisfy users' constraints and preferences, while limiting the load of servers and proxy-caches.
Gossa, Julien +5 more
core +1 more source
Complementary Replicas of Ultra-Rapidly Frozen Specimens [PDF]
, 1985 Complementary freeze-fracture replicas have been prepared of ultra-rapidly cooled specimens in the absence of chemical pretreatments. The grid-sized replicas were stabilized by open mesh gold grids during the cleaning process and, after cleaning, were ...
Fetter, R. D. +2 more
core +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
High resolution replicas [PDF]
, 1988 Disclosed are improved methods for preparing high resolution replicas for electron microscopic analysis. Replicas are prepared having a resolution capability less than ten angstroms, with structures of even less than five angstroms being readily ...
Mizuta, Shun, Brown, R. Malcolm, Jr.
core +1 more source
FEBS Letters, EarlyView.Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil +3 more
wiley +1 more source
Detecting near replicas on the Web by content and hyperlink analysis
, 2003 The presence of replicas or near-replicas of documents is very common on the Web. Whilst replication can improve information accessibility for the users, the presence of near-replicas can hinder the effectiveness of search engines. We propose a method to
Marco Maggini +14 more
core +1 more source
A 3D modelling approach to measuring structural characteristics of bird nest interiors
Methods in Ecology and EvolutionNests are considered extended phenotypes of animals with potentially serious fitness consequences for the survival of offspring. Therefore, nest characteristics may contain valuable information about the underlying ecological and evolutionary mechanisms ...
Jing‐Chia Guo +2 more
doaj +1 more source