  Quark and gluon distributions in the light-cone wavefunction of a high energy
hadron or nucleus are calculated in the saturation regime. One loop
calculations are performed explicitly using the equivalence between the parton
distribution in the light-cone wavefunction and the production distribution of
that parton in a current-nucleon (nucleus) scattering. We argue that, except
for some overall numerical factors, the Weizsacker- Williams wavefunction
correctly gives the physics of the gluon distribution in a light-cone
wavefunction.
