  We investigate QCD coherence effects in deep inelastic scattering (DIS) off
nuclei and in Drell-Yan (DY) dilepton production in proton-nucleus collisions
within the light-cone color-dipole approach. The physical mechanisms underlying
the nuclear effects become very transparent in this approach and are explained
in some detail. We present numerical calculations of nuclear shadowing in DIS
and DY and compare to data. Nuclear effects in the DY transverse momentum
distribution are calculated as well. The dipole approach is the only known way
to calculate the Cronin effect without introducing additional parameters for
nuclear targets.
