Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Ren-2NM_03119310090Ren    Rnr    Rn-2    Ren-1    Ren-B    Ren2   
Ren-2AH00386310095
Ren-2S9975810095
Ren-2AH00386410103
Ren-2S9976310103

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

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Text2Knowledge ... Yong Huang 2002