GJB1 and peripheral neuropathy: Ablation of the connexin32 (Cx32) protein (Nelles et al., 1996) resulted in a demyelinating peripheral neuropathy (Anzini et al., 1997; Scherer et al., 1998) reverted by transgenic expression of human Cx32 in myelinating mouse Schwann cells (Scherer et al., 2005).