Fig. 4From: microRNA profiling in the Weddell seal suggests novel regulatory mechanisms contributing to diving adaptationThe gain and loss of mammalian miRNA orthogroups in 8 mammals, inferred by Dollo parsimony and synteny analyses. Number of gained (+) and lost (−) orthogroups are listed for each branch of the tree (black). Red numbers represent the branch-specific net gain rate of orthogroups per million yearBack to article page