L-valine(in) + L-phenylalanine(out) = L-valine(out) + L-phenylalanine(in)
l-valine(in) + l-phenylalanine(out) = l-valine(out) + l-phenylalanine(in)
L-valine(in) + L-phenylalanine(out) = L-valine(out) + L-phenylalanine(in)
l-valine(in) + l-phenylalanine(out) = l-valine(out) + l-phenylalanine(in)