GJB2 and Bartsocas-Papas syndrome 1: Immunohistochemical staining of palmar and knuckle epidermis from a BPS patient carrying Cx26-N54K exhibited reduced Cx26 expression, while a more widespread expression of Cx30 was observed in lesional skin, possibly as a compensatory mechanism to overcome the abnormal Cx26 function (Richard et al., 2004).