FIG. 2.

Phylogeny of AroB. This phylogeny was calculated from an amino acid alignment of 87 sequences and 209 characters. The node showing separation of the Plantae away from the arom-possessing eukaryotes, indicative of an HGT from the β/γ-proteobacteria is circled. The node supporting monophyly of arom-possessing taxa, with the exception of T. thermophila and T. gondii, and demonstrating arom reduction in R. oryzae is boxed. The figure is illustrated using the same conventions as Fig. 1, with the addition that fusion genes are noted using square brackets and the shikimate gene fusion order is illustrated using the Aro convention. This convention for fusion genes will be used in all subsequent relevant figures.