Phylogenetic tree of the PF02910 family sequences. The phylogenetic tree of 40% representatives of PF0291 and 1jnrA (= O28603_ARCFU/519-641) generated by ANCESCON is shown. Proteins with positive values of ΔS are shown in red. 22 sequences that were excluded from the calculation are shown in blue. The next root position regarded as an ancestral protein is shown in green.