ubiquinol-8 + 2 O2 <=> 2 superoxide + ubiquinone-8 + 2 H(+)
ubiquinol-8 + 2 o2 <=> 2 superoxide + ubiquinone-8 + 2 h(+)
ubiquinol-8 + 2 O2 <=> 2 superoxide + ubiquinone-8 + 2 H(+)
ubiquinol-8 + 2 o2 <=> 2 superoxide + ubiquinone-8 + 2 h(+)