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