Your Query returns 18 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
IRK1NM_00842510090Kcnf1    Kir2.1    Kcnj2    600681
IRK1NM_0008919606LQT7    HHIRK1    KIR2.1    HHBIRK1    KCNJ2    600681
irk1NM_1428747227DIR    dKirI    CG6747    Ir   
irk1NT_0337777227DIR    dKirI    CG6747    Ir   
irk1AJ3443447227
IRK1U2094835884
IRK1AF0211389986
IRK1AF0211409823
IRK1AF0207929913
IRK1AF0119049606600681
IRK1AF0211359544
IRK1AF0211399606600681
IRK1AF02114210141
Irk1AF07267310090600681
IRK1AF02113610090600681
IRK1AF02113710116
IRK1X7305210090600681
IRK1AF0211419031

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

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Text2Knowledge ... Yong Huang 2002