a menaquinol + fumarate + 2 H(+)(in) => a menaquinone + succinate + 2 H(+)(out)
a menaquinol + fumarate + 2 h(+)(in) => a menaquinone + succinate + 2 h(+)(out)
a menaquinol + fumarate + 2 H(+)(in) => a menaquinone + succinate + 2 H(+)(out)
a menaquinol + fumarate + 2 h(+)(in) => a menaquinone + succinate + 2 h(+)(out)