preferred_name: L-histidine(out) + L-tryptophan(in) = L-histidine(in) + L-tryptophan(out)
preferred_name_lc: l-histidine(out) + l-tryptophan(in) = l-histidine(in) + l-tryptophan(out)
label: L-histidine(out) + L-tryptophan(in) = L-histidine(in) + L-tryptophan(out)
label_lc: l-histidine(out) + l-tryptophan(in) = l-histidine(in) + l-tryptophan(out)