FIG 4.

Neighbor-joining tree of SaxA homologues found in full and draft Pectobacterium genome sequences. Amino acid sequences were aligned with Clustal Omega, and phylogenetic trees were calculated in MEGA6 (29) by using 500 bootstrap replicates. Analysis of the data set by the maximum-likelihood method resulted in the same tree topology. The values on the branches are the percentages of replicate trees in which the associated taxa clustered together in the bootstrap test for values of >75. Branches are drawn to scale, and branch lengths are in the same units as the evolutionary distances used to infer the phylogenetic tree. The color coding corresponds to that in Table 2.