Results 41 to 50 of about 5,790,135 (266)

TO THE FAUNA OF THE ICHNEUMONINAE (HYMENOPTERA, ICHNEUMONIDAE) OF NORTHWESTERN RUSSIA

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2018
In this faunistic survey, findings of 108 Ichneumoninae species, excluding tribe Phaeogenini, are reported from different areas of the North-Western Russia, namely Republic Karelia, Murmansk and Arkhangelsk Provinces.
Matthias Riedel, Andrei Humala
doaj   +1 more source

Structural and biochemical analysis of a B12 superbinder

open access: yesFEBS 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

Invasive species threats and opportunities: a primer for Oregon policymakers

open access: yes, 2021
published by Oregon Invasive Species Council.Title from PDF cover (viewed on April 12, 2021).This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program.

core  

New records of Rhaphium (Dolichopodidae, Diptera) from Russian Protected Areas

open access: yesNature Conservation Research: Заповедная наука, 2020
The present study is based on examination of the collection funds of the Zoological Institute of RAS and the Department of Ecology and Systematics of Invertebrates of Voronezh State University.
Olga O. Maslova   +2 more
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS 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

Catalogue of terrestrial isopods (Crustacea, Isopoda, Oniscidea) from Brazil: an update with some considerations

open access: yesNauplius, 2018
All species of Brazilian terrestrial isopod known up to date, including references and distribution information, are listed. The list comprises 189 valid species, 135 of which are endemic to the country, 22 are recorded also from other countries in the ...
Ivanklin Soares Campos-Filho   +2 more
doaj   +1 more source

New geographical records of Mesembrinellidae (Diptera: Oestroidea) in Mexico

open access: yesRevista Chilena de Entomología, 2021
Currently, the family Mesembrinellidae has 55 extant species restricted to the Americas. In this study, the distribution of 6 out of 55 species which corresponds to the Mexican species of the family is discussed.
Santiago Jaume-Schinkel
doaj   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

open access: yesFEBS 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

Pseudoscorpions of Israel: Annotated Checklist and Key, with New Records of Two Families (Arachnida: Pseudoscorpiones)

open access: yesTaxonomy, 2023
The location of Israel at the junction of three continents leads to a unique fauna of both Palearctic and Afrotropical zoogeographic origins. Following systematic revisions over the past sixty years and the discovery of new species, the only available ...
Sharon Warburg   +5 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS 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

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