FIG. 5.

Phylogenetic tree of polyphosphatase (PPX, PPN), pyrophosphatase (PPA), and guanosine pentaphosphate phosphohydrolase (GPP) proteins and putative homologues. Numbers at the nodes represent bootstrap values. Full names of organisms are listed in Materials and Methods. Gene identifiers are shown after the names of organisms. Names of biochemically characterized enzymes are in parentheses. The positions of PPX1 and PPX2 of C. glutamicum are pointed out by arrows. M. smegmatis, Mycobacterium smegmatis; M. avium subsp. paratub., M. avium subspecies paratuberculosis.