Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
hsRPB5BC0044419606RPB5    XAP4    hRPB25    RPABC1    POLR2E   
hsRPB5NM_0026959606RPB5    XAP4    RPABC1    hRPB25    POLR2E   
hsRPB5BC0341449606RPB5    RPABC1    XAP4    hRPB25    POLR2E   

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

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Text2Knowledge ... Yong Huang 2002