Your Query returns 20 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Gjb2NM_00812510090Cx26    Cnx26    Gjb-2    121011
GJB2AY2809719606121011
GJB2AF0915269606121011
GJB2M868499606121011
GJB2AL1386889606121011
GJB2AF2812809606121011
GJB2AY4075389606121011
GJB2AY4075399598
GJB2AY40754010090121011
GJB2AF4797769606121011
GJB2AY0465819593
GJB2AY0465829600
GJB2AY0465839580
GJB2AY0465849544
Gjb2NT_03960610090121011
Gjb2BC01363410090Cx26    Cnx26    121011
Gjb2BC05143710090Cx26    Cnx26    121011
GJB2BC0170489606CX26    DFNA3    DFNB1    NSRD1    PPK    KID    HID    121011
GJB2NM_0040049606HID    KID    PPK    CX26    DFNA3    DFNB1    NSRD1    121011
GJB2NT_0245249606121011

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002