FIGURE 6.

Phylogenetic tree of family GT97. Phylogenetic analysis was carried out using the PhyML software with bootstrapping (23) using the alignment shown in Fig. 7 as input. Protein accession numbers and species names are indicated, and bootstrapping values are given at the nodes. GT97 family members were only found in the bacterial and archaeal domains of life, and the majority of these species are either human or animal commensals (including several opportunistic pathogens) or extreme halophiles, as indicated.