Found 32 datasets matching "positive-selection".
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Background Many RNA viruses do not have a single, representative genome but instead form a set of related variants that has been called a quasispecies. The sequence variability of such...
Search relevance: 105.94 | Views last month: 0 -
Background Intrathymic development and selection of the T lymphocyte repertoire is restricted by the interactions of the T cell antigen receptor and CD4 or CD8 co-receptors with self...
Search relevance: 61.20 | Views last month: 0 -
In light of the slow progress in developing effective therapies for ischemic stroke, magnetic resonance imaging techniques have emerged as new tools in stroke clinical trials. Rapid imaging with...
Search relevance: 47.67 | Views last month: 2 -
We examined nest survival of Greater Sage-grouse (Centrocercus urophasianus; hereafter, sage-grouse) in relation to fine-scale habitat patterns that influenced nest site selection, using data from...
Search relevance: 46.10 | Views last month: 0 -
Background Recently many long-term prospective studies have involved serial collection and storage of blood or tissue specimens. This has spurred nested case-control studies that involve...
Search relevance: 44.56 | Views last month: 1 -
To assess the impact of somatic hypermutation and selective influences on the Vλ light chain repertoire in systemic lupus erythematosus (SLE), the frequency and pattern of mutations were analyzed...
Search relevance: 39.14 | Views last month: 0 -
Background The Master Catalog is a collection of evolutionary families, including multiple sequence alignments, phylogenetic trees and reconstructed ancestral sequences, for all...
Search relevance: 37.55 | Views last month: 2 -
Background To evaluate changes in H pylori infection prevalence in Greece during a ten-year period, and to examine its antigenic profile. Methods ...
Search relevance: 35.04 | Views last month: 0 -
Background The physico-chemical properties of chlorophylls b and c have been known for decades. Yet the mechanisms by which these secondary chlorophylls support assembly and accumulation...
Search relevance: 33.88 | Views last month: 0 -
Background Suspected acute appendicitis is the most frequent cause for emergency operations in visceral surgery worldwide. In approximately twenty percent of all cases however, the...
Search relevance: 32.32 | Views last month: 1 -
Background Gene fusions can be used as tools for functional prediction and also as evolutionary markers. Fused genes often show a scattered phyletic distribution, which suggests a role...
Search relevance: 32.15 | Views last month: 3 -
Background Very low birthweight, i.e. a birthweight < 1500 g, is among the strongest determinants of infant mortality and childhood morbidity. To develop primary prevention approaches to...
Search relevance: 30.34 | Views last month: 2 -
Bats of the genus Lasiurus occur throughout the Americas and have diversified into at least 20 species among three subgenera. The hoary bat (Lasiurus cinereus, or synonymously, Aeorestes cinereus)...
Search relevance: 29.59 | Views last month: 0 -
This dataset contains Global Ecosystem Dynamics Investigation (GEDI) Level 4A (L4A) Version 2 predictions of the aboveground biomass density (AGBD; in Mg/ha) and estimates of the prediction...
Search relevance: 29.14 | Views last month: 1 -
This dataset contains Global Ecosystem Dynamics Investigation (GEDI) Level 4A (L4A) Version 2 predictions of the aboveground biomass density (AGBD; in Mg/ha) and estimates of the prediction...
Search relevance: 29.14 | Views last month: 0 -
We used two independent approaches, biometry and micrometeorology, to determine the net ecosystem production (NEP) of an old growth forest in Para, Brazil. Biometric inventories indicated that the...
Search relevance: 28.40 | Views last month: 0 -
We used two independent approaches, biometry and micrometeorology, to determine the net ecosystem production (NEP) of an old growth forest in Para, Brazil. Biometric inventories indicated that the...
Search relevance: 28.25 | Views last month: 0 -
In 2014, the San Diego Association of Governments applied for and received funding from the National Institute of Justice (NIJ) to conduct a process and impact evaluation of the Veterans Moving...
Search relevance: 27.12 | Views last month: 0 -
This table contains an all-sky sample of ~1.4 million active galactic nuclei (AGNs) meeting a two-color infrared photometric selection criterion for AGNs as applied to sources from the Wide-field...
Search relevance: 25.90 | Views last month: 0 -
This table contains the improved point-source catalog for the 250-ks Extended Chandra Deep Field-South (E-CDF-S) Survey, implementing a number of recent improvements in Chandra source-cataloguing...
Search relevance: 24.33 | Views last month: 0
