Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
po1D2NM_00889410090p50    50kDa    Pold2   
po1D2BC00334210090p50    50kDa    Pold2   

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

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Text2Knowledge ... Yong Huang 2002