Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
RPC4NM_0259451009044kDa    BN51T    TSBN51    2810426M17Rik    Polr3d   
RPC4BC0030399606TSBN51    BN51T    POLR3D   
RPC4BC0026039606TSBN51    BN51T    POLR3D   
RPC4BC0044849606TSBN51    BN51T    POLR3D   
RPC4NM_0017229606BN51T    TSBN51    POLR3D   
RPC4BC01610210090BN51T    44kDa    TSBN51    Polr3d   
RPC4NC_0011364932RPC53   

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

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Text2Knowledge ... Yong Huang 2002