ID 1.13.11.66 DE hydroquinone 1,2-dioxygenase. AN hydroquinone dioxygenase. CA hydroquinone + O2 = (2E,4Z)-4-hydroxy-6-oxohexa-2,4-dienoate + H(+). CC -!- The enzyme is an extradiol-type dioxygenase, and is a member of the CC nonheme-iron(II)-dependent dioxygenase family. CC -!- It catalyzes the ring cleavage of a wide range of hydroquinone CC substrates to produce the corresponding 4-hydroxymuconic CC semialdehydes. DR Q9WXE6, LINE_SPHIU ; //