24 del Castillo del Castillo I I Villamar Villamar M M Moreno-Pelayo Moreno-Pelayo MA MA del Castillo del Castillo FJ FJ A deletion involving the connexin 30 gene in nonsyndromic hearing impairment A deletion involving the connexin 30 gene in nonsyndromic hearing impairment N Engl J Med. Here, GJB6 is linked to Hearing impairment.