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