  In this paper we present a simple analytic expression for the (spin-averaged)
neutrino-nucleon cross section for ultra-high energies at twist-2, obtained as
the asymptotic limit of our previous findings. This expression gives values for
the cross section in remarkable numerical agreement with the previous numerical
evaluation in the energy region relevant for forthcoming neutrino experiments.
Moreover, we discuss the role and the relevance of saturation and recombination
effects in our approach, in comparison with other recent suggestions.
