preferred_name: L-tryptophan(out) + Na(+)(out) => L-tryptophan(in) + Na(+)(in)
preferred_name_lc: l-tryptophan(out) + na(+)(out) => l-tryptophan(in) + na(+)(in)
label: L-tryptophan(out) + Na(+)(out) => L-tryptophan(in) + Na(+)(in)
label_lc: l-tryptophan(out) + na(+)(out) => l-tryptophan(in) + na(+)(in)