bination of GM2 and GM1, GM1 and GD1b, can serve as antigens in patients with neuropathies.17 When IgM recognizes the Gal (pl-3) GalNAc moiety of GM1, which is found on the surface of motor neurons, there is clinically a motor neuropathy, but if recognizes epitopes containing disialosyl groups of GDlb, which is present on the dorsal root ganglionic