Figure 6 - full size

 

Figure 6.
Figure 6. Schematic view of the hCA II (A) (PDB code 1CA2),[27] hCA I (B) (PDB code 2CAB),[28] hCA XIII (C), and hCA III (D) (PDB code 1Z93)[26] structures. The zinc ion and its three histidine ligands (H94, H96, and H119) are shown. For each isozyme, the histidine residues participating to the proton-transfer reaction are also reported by PyMOL sphere representation (http://pymol.sourceforge.net/).

The above figure is reprinted by permission from John Wiley & Sons, Inc.: Proteins (2008, 74, 164-175) copyright 2008.