Your Query returns 16 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
u2af1AF5062027955
U2af1NM_0241871009035kDa    2010107D16Rik    191317
U2AF1BC0059159606RNU2AF1    U2AF35    RN    U2AFBP    191317
U2AF1BC0011779606RNU2AF1    U2AF35    RN    U2AFBP    191317
U2AF1BC0019239606RNU2AF1    U2AF35    RN    U2AFBP    191317
U2AF1AP0017489606191317
U2AF1NM_0067589606RN    U2AF35    U2AFBP    RNU2AF1    191317
U2af1NT_03964910090191317
U2af1BC0021841009035kDa    191317
U2AF1AJ2917629031
U2AF1AJ2917639031
U2AF1AJ2917649031
U2AF1AJ2917659031
U2AF1NT_0301889606191317
u2af1NM_1774797955CHUNP6860   
U2AF1NM_2046559031

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

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Text2Knowledge ... Yong Huang 2002