Figure 4.
(a) The active site of L. salivarius RpiA showing the two phosphate (PO4 3−) ions bound in the phosphate- and sugar-binding pockets. (b) Model of Ru5P bound to L. salivarius RpiA using the bound phosphate ions as a reference based on the structure of Ru5P bound to V. vulnificus, showing that the mode of binding is likely to be essentially identical.