We present preliminary results on the proton spin structure function in full
QCD. The measurement has been done using 4 flavours of staggered fermions and
an improved definition of the lattice topological charge density.Comment: 3 pages, 3 figures, contribution to Lattice-97. Latex file including
espcrc2.sty. The colour of a line in the first figure has been changed to
avoid problems on some printer
