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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).
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