  We present results for the non-perturbative determination of the improvement
and renormalization factors of the isovector axial current for lattice QCD with
two flavors of dynamical Wilson quarks. The improvement and normalization
conditions are formulated in terms of matrix elements of the PCAC relation in
the Schroedinger functional setup and results are given in the form of
interpolating formulae for bare gauge couplings beta=6/g_0^2>5.2.
