Expression levels of therian genes in the X-conserved region and their autosomal counterparts in platypus and chicken.

<p>Left: Global expression levels (based on third quartiles of the RPKM distribution) of genes in the therian XCR (see <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.1001328#pbio-1001328-g003" target="_blank">Figure 3B</a> legend for details) and their autosomal orthologs in outgroup species with different sex chromosome systems (see <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.1001328#pbio.1001328.s010" target="_blank">Figure S10</a> for all five somatic tissues). Error bars represent the range containing 90% of the third quartiles of individual resampling sets (80% of 90 orthologous genes were resampled 100 times). Right: Expression levels of resampled sets of 90 genes that are autosomal in all ten species. The central value is the median of the third quartiles of resampled sets (error bars represent the central 90% of the distribution of those third quartiles).