
Figure 2
Evolutionary constraints on mouse tissues have been constant since the divergence of human and rodent lineages (∼75 million years ago). Median KA/KS values have been calculated for mouse tissue-specific genes using the yn00 method of Yang and Nielsen (2000; see Table 4). The 1:1 rat–mouse and human–mouse orthology relationships were obtained from Ensembl's Compara database.











