Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
AceCS1NM_01981110090ACAS    Acas1    1110017C11Rik    Acas2   
AceCS1BC05143210090ACAS    1110017C11Rik    Acas2   

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

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Text2Knowledge ... Yong Huang 2002