Sentences with phrase «frequency of the gene variants»

The increased risk closely correlates with the frequency of a gene variant previously associated with that adverse reaction, supporting recommendations to screen for that variant in patients from those populations.

Not exact matches

An apparently new Variant of human serum albumin, albumin Naskapi, has been found in high frequency in the Naskapi Indians of Quebec and, in lower frequency, in other North American Indians.The family and population data of the albumin are consistent with its inheritance as a simple autosomal trait Controlled by a gene designated Al Naskapi.

In many cases, the activity of particular genes was tied to a single genetic variant, with strong differences in frequency between European and African populations.

For instance, when the researchers removed the possible confounding influence of ApoE4 by looking only at families lacking that ApoE variant, they found that the frequency of the mutant A2M gene in Alzheimer's patients was four times greater than in their siblings who did not have the disease.

Recent studies have found elevated levels of this protein in post-mortem brain samples of patients with MS.. In this latest work, investigators compared the frequencies of «more active» and «less active» variants of the DNA sequences that control expression of the galanin gene between healthy controls and MS patients.

However, when we extracted gene expression levels from the brain transcriptome data following the methodology in Carneiro et al. [29], we found that levels of nucleotide diversity and the proportion of low frequency variants between lowly (bottom 5 %) and highly (top 5 %) expressed genes in our dataset (Table S7) were not significantly different in most comparisons (with the exception of π in O. c. cuniculus) nor did they consistently differ in the expected direction when assuming higher error rates in lowly expressed genes.

In addition, the data reveal that this was a more genetically diverse population than the central and western European hunter - gatherers living during the same epoch and that they also show pattern of adaptation to high latitude environments, including high frequencies of low pigmentation variants as well as a gene region associated with physical performance, which shows strong continuity into modern - day northern Europeans.

For each of the three genes, one allele (variant) is found at unusually high frequency in dogs that have been treated for bloat, and the presence of any one of these «risk» alleles triples the chance that the dog will experience bloat at some time in its life.

Doing a genetic test and subsequently eliminating an individual from the breeding population may not be the best strategy, as by targeting a particular allele at one genetic locus for removal from the gene pool of a particular breed, breeders may in fact increase allele frequency of genetic variants on alternative haplotypes at the same, or a different locus, that are recessively deleterious.

Here, we review recent work that has demonstrated a robust cross-national correlation between the relative frequency of variants in these genes and the relative degree of individualism — collectivism in each population, suggesting that collectivism may have developed and persisted in populations with a high proportion of putative social sensitivity alleles because it was more compatible with such groups.