preferred_name: K(+)(in) + 2 chloride(in) + Na(+)(in) => K(+)(out) + 2 chloride(out) + Na(+)(out)
preferred_name_lc: k(+)(in) + 2 chloride(in) + na(+)(in) => k(+)(out) + 2 chloride(out) + na(+)(out)
label: K(+)(in) + 2 chloride(in) + Na(+)(in) => K(+)(out) + 2 chloride(out) + Na(+)(out)
label_lc: k(+)(in) + 2 chloride(in) + na(+)(in) => k(+)(out) + 2 chloride(out) + na(+)(out)