preferred_name: citrate(out) + 4 Na(+)(out) <=> citrate(in) + 4 Na(+)(in)
preferred_name_lc: citrate(out) + 4 na(+)(out) <=> citrate(in) + 4 na(+)(in)
label: citrate(out) + 4 Na(+)(out) <=> citrate(in) + 4 Na(+)(in)
label_lc: citrate(out) + 4 na(+)(out) <=> citrate(in) + 4 na(+)(in)