Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ring1bBC0444727955wu:fa19h05    fa19h05    wz4556    MGC55753    rnf2   
Ring1BNM_01127710090dinG    Rnf2   
ring1bNM_1312137955wz4556    fa19h05    MGC55753    wu:fa19h05    rnf2   
Ring1BBC02012210090dinG    Rnf2   
ring1bAF1963467955

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

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Text2Knowledge ... Yong Huang 2002