Figure 2.

Phosphorylation follows phylogeny. The distance measure used in the construction of this neighbor-joining tree is (1 - relative overlap; described in detail in the main text). If the tree is rooted at the branch marked with the x, the topology of this tree is identical to the topology of the tree of life of these six species. The tree was generated with Quicktree [32] and visualized using Treeview [33].