Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
5031411E02RikNM_1787941009035kDa    U2af1-rs2   
5031411E02RikNM_0094531009035kDa    U2af1-rs2   

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

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Text2Knowledge ... Yong Huang 2002