sucrose(out) + H(+)(in) => sucrose(in) + H(+)(out)
sucrose(out) + h(+)(in) => sucrose(in) + h(+)(out)
sucrose(out) + H(+)(in) => sucrose(in) + H(+)(out)
sucrose(out) + h(+)(in) => sucrose(in) + h(+)(out)