  We have studied the color dipole picture for the description of the deep
inelastic process, mainly the structure functions which are driven directly by
the gluon distribution. Estimates for those functions are obtained using the
effective dipole cross section given by the Glauber-Mueller approach in QCD,
encoding the corrections due to the unitarity effects associated with the
saturation phenomenon. Frame invariance is verified in the calculations of the
observables when analysing the experimental data.
