preferred_name: a menaquinone + H2 + 2 H(+)(in) => a menaquinol + 2 H(+)(out)
preferred_name_lc: a menaquinone + h2 + 2 h(+)(in) => a menaquinol + 2 h(+)(out)
label: a menaquinone + H2 + 2 H(+)(in) => a menaquinol + 2 H(+)(out)
label_lc: a menaquinone + h2 + 2 h(+)(in) => a menaquinol + 2 h(+)(out)