ubiquinone-8 + NADPH + H(+) <=> ubiquinol-8 + NADP(+)
ubiquinone-8 + nadph + h(+) <=> ubiquinol-8 + nadp(+)
ubiquinone-8 + NADPH + H(+) <=> ubiquinol-8 + NADP(+)
ubiquinone-8 + nadph + h(+) <=> ubiquinol-8 + nadp(+)