Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
2610042B21RikNM_13874810090D12Bwg0916e    Ppp2r4   
2610042B21RikBC00662610090Ppp2r4   
2610042B21RikBC05285210090D12Bwg0916e    Ppp2r4   

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

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Text2Knowledge ... Yong Huang 2002