Fig. 8.
Enzyme-substrate, intermediates and the enzyme-product complex observed in different subunits of the homogentisate dioxygenase (HGD) enzyme-substrate complex contained within the asymmetric unit of the enzyme crystal after reacting with O2 (PDB 3ZDS, 1.70 Å) [47]. Structures of the (A) [HGD(substrate)], (B) [HGD(semiquinone)(superoxo)], (C) [HGD(alkylperoxo)], and (D) the enzyme-product complexes.