Figure 4. Comparison of binding of c-diGMP and 5′-pGpG.

FimX-EAL in complex with 5′-pGpG (green) and c-di-GMP (cyan) (PDB code 3HV8) are superimposed. The phosphate groups of 5′-pGpG are numbered P1 and P2. The two views are rotated by 90° from each other.