Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Rac1bNM_1398647227Rac    RacB    rac2    DRac2    DRacB    Rac-2    CG8556    Drac1b   
Rac1bNT_0374367227Rac    RacB    rac2    DRac2    DRacB    Rac-2    CG8556    Drac1b   
rac1BAF31088444689

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

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Text2Knowledge ... Yong Huang 2002