ID 1.10.3.6 DE rifamycin-B oxidase. CA rifamycin B + O2 + 2 H(+) = rifamycin O + H2O2. CC -!- Also acts on benzene-1,4-diol and, more slowly, on some other CC p-quinols. CC -!- Not identical with EC 1.10.3.1, EC 1.10.3.2, EC 1.10.3.4 or CC EC 1.10.3.5. //