2 a ubiquinol + O2(in) + 4 H(+)(in) => 2 a ubiquinone + 2 H2O(in) + 4 H(+)(out)
2 a ubiquinol + o2(in) + 4 h(+)(in) => 2 a ubiquinone + 2 h2o(in) + 4 h(+)(out)
2 a ubiquinol + O2(in) + 4 H(+)(in) => 2 a ubiquinone + 2 H2O(in) + 4 H(+)(out)
2 a ubiquinol + o2(in) + 4 h(+)(in) => 2 a ubiquinone + 2 h2o(in) + 4 h(+)(out)