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Summary of the Chemical Structures of Ligands Covalently Bound to Reduced Molybdenum in the Active Site of XOR. A; urate, B: oxipurinol, C: FYX-051, D: trihydroxy-FYX-051. E; proposed mechanism of NO formation by XO based on reference [57]. Related crystal structures are shown below. Figures were generated from PDB ID 3AMZ, 3BDJ, 1V97 and 3AM9, respectively (45, 51, 19, 52).
