  We explore the missing momentum dependence of the CT effects in quasielastic
(e,e'p) scattering. We develop the coupled-channel multiple-scattering theory
(CCMST) description of final-state interaction including both the coherent and
incoherent rescatterings of the ejectile state. We demonstrate that the
contribution of the off-diagonal incoherent rescattering does not vanish at low
Q^{2} which is a novel correction to the conventional Glauber theory evaluation
of nuclear transparency. We comment on the nontrivial impact of this correction
on the onset of CT. The sensitivity of the onset of CT to the 3q-nucleon
reggeon amplitudes is discussed for the first time. We present numerical
results for nuclear transparency as a function of the missing momentum for
exclusive (e,e'p) reaction in the kinematical region of Q^{2} \le 40 GeV^{2}
and p_{m} \le 250$ MeV/c. Our evaluations show that at Q^{2}\sim 10 CT effects
are substantial only in antiparallel kinematics at p_{m,z}\sim -250 MeV/c. The
effect is enhanced on light nuclei and could be observed in a high precision
experiment.
