preferred_name: 2 Na(+)(in) + 3 H(+)(out) = 2 Na(+)(out) + 3 H(+)(in)
preferred_name_lc: 2 na(+)(in) + 3 h(+)(out) = 2 na(+)(out) + 3 h(+)(in)
label: 2 Na(+)(in) + 3 H(+)(out) = 2 Na(+)(out) + 3 H(+)(in)
label_lc: 2 na(+)(in) + 3 h(+)(out) = 2 na(+)(out) + 3 h(+)(in)