Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
FLJ21921BC0048829606Rpo1-2    FLJ10816    RPA135    POLR1B   
FLJ21921NM_0190149606RPA135    Rpo1-2    FLJ10816    POLR1B   

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

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Text2Knowledge ... Yong Huang 2002