Figure 3 - full size

 

Figure 3.
Figure 3 Dimer formed by the molecules A and B. Molecule pairs CD and EF display a similar arrangement. The sodium ion is shown as a solid ball.

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (2005, 61, 1255-1262) copyright 2005.