Figure 6

Relationship between expression levels of genes and the conservation in first intron. The figure shows the relationship between gene expression level and the first intron conservation for four different human tissues. Then Kendall’s tau correlation test results are shown. Conservations in first intron and upstream flanking region, but not in the downstream region, have significant positive correlations with expression levels of genes. For smoothing, genes are binned into groups of 50 by expression level. Each dot represents the mean values for conservation and the expression levels of 50 genes per bin.