ID 1.10.3.17 DE superoxide oxidase. AN cytochrome b561. CA a ubiquinol + 2 O2 = a ubiquinone + 2 H(+) + 2 superoxide. CC -!- This membrane-bound, di-heme containing enzyme, identified in the CC bacterium Escherichia coli, is responsible for the detoxification of CC superoxide in the periplasm. CC -!- In vivo the reaction proceeds in the opposite direction of that shown CC and produces oxygen. CC -!- Superoxide production was only observed when the enzyme was incubated CC in vitro with an excess of ubiquinol. DR P0ABE5, C561_ECOLI ; P0ABE6, C561_SHIFL ; Q9X6B2, C561_YERPE ; //