Figure 2
The asymmetric units of (a) cGMP·5H2O, (III), (b) Na(cGMP)·4H2O, (IV), and (c) Na(cIMP)·4H2O, (V), showing the atom-numbering schemes and symmetry-independent hydrogen bonds (dashed lines). Displacement ellipsoids are shown at the 30% probability level for (III) and at 50% for (IV) and (V). Transparent spheres (and grey labels) in (III) represent selected positions (with the highest site-occupation factors) of the partially occupied O atoms of the disordered water molecules. In (IV) and (V), they represent the water positions with lower site-occupation factors. For the details of (III), see Fig. S3 in the Supporting information. |