Your Query returns 11 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Nkx2.2NM_01091910090tinman    Nkx-2.2    Nkx2-2   
Nkx2.2AF1840459606NKX2B   
NKX2.2NM_0025099606NKX2B    NKX2-2   
nkx2.2NM_13142279555090    nk2.2    nkx2-2    id:ibd5090   
Nkx2.2AH0070389606
Nkx2.2AF0194149606
Nkx2.2AF0194159606
NKx2.2X8140810036
Nkx2.2AH01098610090
Nkx2.2AY04465710090
Nkx2.2AY04465810090

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

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Text2Knowledge ... Yong Huang 2002