2 superoxide + menaquinone-8 + 2 H(+) => menaquinol-8 + 2 O2
2 superoxide + menaquinone-8 + 2 h(+) => menaquinol-8 + 2 o2
2 superoxide + menaquinone-8 + 2 H(+) => menaquinol-8 + 2 O2
2 superoxide + menaquinone-8 + 2 h(+) => menaquinol-8 + 2 o2