Sentence examples for be under more selective from inspiring English sources

Given that synonymous sites can be subject to selection for specific tRNA anticodons, one might expect them to be under more selective constraints than intergenic regions; therefore, it is not surprising that nucleotide diversity for the intergenic regions is greater than πsyn.

Given the numerous reports that have shown that first introns tend to be under more selective constraint (see Introduction), it seems likely that there could be many different sequence elements present in these early introns.

Altogether, slow growth may be under more selective pressure in host-dependent bacteria than in free-living bacteria.

Specifically, the higher GC content in B. napus microspore-specific genes than in flower-specific genes suggests that the male portion of the flower may be under more selective pressure for codon usage than the flower as a whole.

These results suggest that the promoter regions of transporters expressed primarily in the kidney are under more selective pressure than those of transporters expressed primarily in the liver.

The proportion of polymorphic sites (Table 1, last column) is similar among protein coding genes and lower for RNA coding genes, which are under more selective constraint.

An additional, non-mutually exclusive possibility is that the advertisement call may have been under more selective pressure due to interference from environmental background noise [ 51].

That is, compared to the genome-wide levels of selective pressure, genes that were identified as involved in cold response based on functional studies (i.e., CRG genes) displayed significantly lower levels of selective pressure, while cold responsive (CGO) genes were under more selective constraints.

In contrast, words in introns are likely to be under more relaxed selective constraints, unless they are important for gene functions, for example by providing docking sites for splicing factors [ 2] or for enzymes involved in the post-transcriptional processing of a transcript [ 3, 4].

Recently, Ma et al. (2010) reported that synonymous substitution may be under more relaxed selective pressure when synonymous substitution occur in genes encoding enzymes compared with that occur in genes encoding nonenzyme genes, as regulatory mechanisms may differ between enzyme and nonenzyme genes.

Greater nucleotide diversity was observed in promoters with strong activity compared to promoters with weak activity, suggesting that weak promoters are under more negative selective pressure than promoters with high activity.