Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Oas1gNM_01185210090L2    Mmu-L    Oas1a    Oias1    Mmu-L2    Oias-1   
Oas1gNT_08076210090
Oas1gAF48041710090
Oas1gBC01847010090Oas1a    Mmu-L    Mmu-L2    L2   

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

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Text2Knowledge ... Yong Huang 2002