Before revision:   ]  We present a general solution for the steady-state statistics of the number of enzyme molecules in the on and off states, and for the flip time (persistence ) distributions for this model switch .
After revision:  Phys. Rev. Lett., 101, 118104] We present a general solution for the steady-state statistics of the number of enzyme molecules in the on and off states, and for the flip time (persistence ) distributions for this model switch .