Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Oasl2NM_03354110090Oasl5    Oas1c   
Oasl2NM_01185410090Oasl    M1204    Mmu-OASL   
Oasl2NT_07845810090
Oasl2BC03436110090Oasl    M1204    Mmu-OASL   

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

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