Figure 3 - full size

Figure 3.
Figure 3. A potassium ion (blue) was located at the dimer interface near the cofactor binding site. The carbon atoms of the neighboring catalytic monomer are colored gray and water molecules are shown as red spheres. The ion's hydrogen bonding partners and bond distances, clockwise from Asp264, are 2.94 Å and 2.49 Å, Asn460 (2.66 Å), Ser22 (2.57 Å), Gly20 (2.30 Å), and Phe260 (2.64 Å).