Figure 1 - full size

 

Figure 1.
Figure 1 Schematic degradation pathway of uric acid to allantoin through intermediate (2) (5-hydroxyisourate). Only the first step is catalyzed by the enzyme, with H[2]O[2] as the by-product.

The above figure is reprinted by permission from the IUCr: Acta Crystallogr D Biol Crystallogr (2004, 60, 453-462) copyright 2004.