Figure 8
From: A new family of periplasmic-binding proteins that sense arsenic oxyanions
Binding-pocket alignment of AioX, ArrX, ArxX and PhnD. Residues that bind phosphate in AioX are in bold; residues that bind arsenite in AioX are highlighted in yellow; residues that bind phosphonate in PhnD are denoted *; putative signaling loop in AioX is underlined; AioX numbering. Note: there is only one residue that binds phosphate but not arsenite, and one residue that binds phosphonate in PhnD that is not conserved in AioX/ArrX/ArxX.
