Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Atp6n1aNM_01692010090Vpp1    Vpp-1    ATP6a1    Atp6n1    Atpv0a1    Atp6v0a1    192130
ATP6N1ABC0323989606ATP6N1    VPP1    Stv1    Vph1    a1    ATP6V0A1    192130
ATP6N1ANM_0051779606a1    Stv1    VPP1    Vph1    ATP6N1    ATP6V0A1    192130
Atp6n1aNW_04733910116
Atp6n1aNM_03160410116Atp6n1   

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

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Text2Knowledge ... Yong Huang 2002