Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
NK1.1AY31622710090Nkrp1c    Klrb1c   
NK1.1NM_00852710090Nk1    Ly59    Nk-1    CD161    Ly-59    Ly55c    NK-1.1    NK-RP1    NKR-P1    Nk-1.2    Nkrp1-c    Klrb1c   

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

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Text2Knowledge ... Yong Huang 2002