Autoantibodies against ganglioside antibodies, myelin protein (P0, PMP22), nodal proteins (NF155, CNTN1, CNTN1/CASPR1, CNTN2/CASPR2 complex, neuronal cell adhesion molecule (NCAM)), gliomedin and two subunits of sodium channel at nodes of Ranvier (NavB1, NavB2) have been investigated in CIDP patients. The gene discussed is CNTN1; the disease is chronic inflammatory demyelinating polyradiculoneuropathy.