L-tryptophan(in) + L-phenylalanine(out) => L-tryptophan(out) + L-phenylalanine(in)
l-tryptophan(in) + l-phenylalanine(out) => l-tryptophan(out) + l-phenylalanine(in)
L-tryptophan(in) + L-phenylalanine(out) => L-tryptophan(out) + L-phenylalanine(in)
l-tryptophan(in) + l-phenylalanine(out) => l-tryptophan(out) + l-phenylalanine(in)