Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
RgnefNM_01202610090RIP2    RhoGEF    Rhoip2    D13Bwg1089e   
RGNEFBC0129469606FLJ21817    KIAA1998   
RGNEFXM_3529629606
RgnefNT_03959010090
RGNEFNT_0067139606
RGNEFXM_3764059606

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

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Text2Knowledge ... Yong Huang 2002