Figure 6 - full size

 

Figure 6.
Figure 6. Fig 6 a, The coordination geometry of the zinc binding site at the dimer interface. The zinc ion is represented by a green sphere and waters by red spheres. The structural elements in the two monomers are colored in brown and blue respectively. The C-terminal end of helix 1 is distorted by forming a 3[10]-helix. The coordination angles subtended by the zinc and ligated atoms are in the range of 99−117°. b, Ribbon diagram of the pf PDO dimer. The two monomers are colored in brown and blue respectively. The active site disulfides are shown in ball-and-stick representation and colored in yellow. The two zinc ions, which are related by the crystallographic two-fold axis, are shown by green spheres.

The above figure is reprinted by permission from Macmillan Publishers Ltd: Nat Struct Biol (1998, 5, 602-611) copyright 1998.