2 chloride(in) + H(+)(out) => 2 chloride(out) + H(+)(in)
2 chloride(in) + h(+)(out) => 2 chloride(out) + h(+)(in)
2 chloride(in) + H(+)(out) => 2 chloride(out) + H(+)(in)
2 chloride(in) + h(+)(out) => 2 chloride(out) + h(+)(in)