Figure 7
The arrangement of the cAMP zwitterions within the layer [parallel to the (001) plane] in the crystal lattice of (II). Similar layers are also present in (I). H atoms not involved in hydrogen bonds (dashed lines) have been omitted for clarity. The symmetry codes are as given in Table 7. syn-cAMP-A and anti-cAMP-B are shown in sea green and light green, respectively. |