Fig. 5

Phylogenetic tree of the Endo VII motif–containing sequences. An unrooted radial tree was drawn, as there was not a suitable outgroup. The top portion of the tree was named Endonuclease Clade and the bottom portion was named Resolvase Clade. The branch length represents the expected number of substitutions per site, and the scale bar shows 0.1 substitution per site. The branch color shows the organism type. A color bar on the left of a sequence name indicates the location of the Endo VII motif in that sequence, yellow for C-terminal and purple for N-terminal. Dots on the branches indicate bootstrap values > 50%. Branches with triangles on the end contain more than one sequences from the same organism type whose Endo VII motifs are in similar locations of a protein. The number in the parenthesis after a clade name indicates the number of sequences in that clade and the sequences are listed in Additional file 7: Table S2