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