preferred_name: 2 nitrate(in) + H(+)(in) => 2 nitrate(out) + H(+)(out)
preferred_name_lc: 2 nitrate(in) + h(+)(in) => 2 nitrate(out) + h(+)(out)
label: 2 nitrate(in) + H(+)(in) => 2 nitrate(out) + H(+)(out)
label_lc: 2 nitrate(in) + h(+)(in) => 2 nitrate(out) + h(+)(out)