Figure 6
Coordination at the metal ion-binding sites in the (a) 0 s, (b) 60 s and (c) 230 s structures. The coordinate bonds are shown as dashed lines with averaged distances (Å) of the four HindIII molecules in the asymmetric unit. The coordinate bonds from the main-chain O atom of Ala109 and from the phosphate-moiety O atom of DA5 to the Na+ ion at site A are indicated by bold lines. |