The evolution equation for the nonsinglet distribution of partons is solved
in the leading order of perturbative QCD. It is shown that an exact analyt
ic solution to the evolution equations call be found in the quasielastic li
mit. The Q(2) evolution of the structure function for x --> 1 is in good ag
reement with experimental data. (C) 2001 MAIK "Nauka/Interperiodica".