Figure 4.

Each plot shows the expression profile across the 15 species for gene in the extreme tails of the empirical distribution of the test statistic for a gene-specific ${\beta }_i$ differing from ${\beta }_{\text{shared}}$ ($LR{T}_{{\beta }_i\ne {\beta }_{\text{shared}}}$). a) shows genes with high-$\widehat{{\beta }_i}$ values. b) shows genes with low-$\widehat{{\beta }_i}$ values.