Figure 3
From: A new family of periplasmic-binding proteins that sense arsenic oxyanions
Maximum-likelihood phylogenetic tree of AioX and its homologues. ABP, antigen-binding protein; AioX (red) and ArxX (blue), arsenite-binding proteins; ArrX, (green), arsenate-binding proteins; MBP, molybdate-binding proteins (a: archaeal; b: bacterial); PBP, phosphate-binding proteins (*involved in sensing not transport); PhnD, phosphonate-binding proteins; SBP: sulphate-binding proteins; TBP: tungstate-binding protein.
