Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
AA-NATNM_01281810116Nat4    Aanat   
AA-NATNM_0010889606SNAT    AANAT   
AA-NATAF317891204747

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

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Text2Knowledge ... Yong Huang 2002