L-alanyl-L-proline(in) + H(+)(in) => L-alanyl-L-proline(out) + H(+)(out)
l-alanyl-l-proline(in) + h(+)(in) => l-alanyl-l-proline(out) + h(+)(out)
L-alanyl-L-proline(in) + H(+)(in) => L-alanyl-L-proline(out) + H(+)(out)
l-alanyl-l-proline(in) + h(+)(in) => l-alanyl-l-proline(out) + h(+)(out)