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