If interest in the 3-D version of "Clash of the Titans" drops sharply, analysts will view that as a signal of negative word of mouth.
One might disagree with the authors' assessment of the most reliable studies, but it is, nonetheless, most accurate to characterize the overall literature this survey covers as providing a rather clear signal of negative employment effects for the least-skilled workers most likely to be affected by minimum wages.
An inconclusive signal of negative balancing selection was detected on gambicin by an elevated KA/KS ratio (0.4, not statistically lower than one) due to reduced KS.
Modeling shows that the database contains more negative and/or positive selection than the neutral expectation about the mean Ka/Ks ratio (itself a signal of negative selection).
These forces will further increase variance in polymorphism at unselected sites and may thus obscure the signal of negative selection at selected sites.
Positive adaptive evolution occurs episodically during the evolution of proteins and this selection signal is generally swamped in a background signal of negative selection, which makes it difficult to robustly identify adaptive evolution.
In the core subnetwork, however, there was no strong evidence of negative correlation between the coselection scores and SPL, although marginal signal of negative correlation was found in EAS (supplementary fig. S5 A, Supplementary Material online, P = 0.02, supplementary table S3, Supplementary Material online).
Although this difference could be explained in part by the limited number of genomes included in this investigation, the patterns observed in P. vivax are more similar to those observed in humans, in which there are few genes with significant evidence of positive selection and a very strong signal of negative selection (Bustamante et al. 2005; Boyko et al. 2008; Eilertson et al. 2012).
The background signals were subtracted using average signal intensities of negative controls, then the signal intensities were normalized across the samples and converted to β value β = M/(M + U + 100) in GenomeStudio following the manufacturer's manual.
