Research Paper Volume 6, Issue 10 pp 879—899

Figure 2. Overview of orthologous genes shared between the bowhead whale and other mammals and the phylogenetic position of the bowhead whale. (A) Venn diagram showing the number of common and unique orthologs identified in the liver, kidney and heart. (B) Estimation of divergence time using phylogenetic analysis of 10 species based on 6,998 orthologous genes from the liver. Triangle arrows and the numbers above denote the most recent common ancestor (MRCA), and the scale units are million years ago. The standard error range for each divergence time is represented by a dashed line. The red solid circles on the branch nodes denote the node as an ‘age constraint’ used in the estimation of the time of divergence.