An example phylogenetic tree. This is one output of the PhIGs analysis that is shown on the Cluster View webpage. Instead of simply listing the members of a cluster, a phylogenetic tree is created showing the evolutionary relationships of this multigene family. In this example, we can see that this family had gene duplication events at the base of vertebrates and in the fish lineage. Because the branch lengths are proportional to the rate of amino acid substitutions, we can see how rates of evolution have varied.