Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
wu:fd16e02BC0445387955fd16e02    zgc:55917   
wu:fd16e02BC0445017955fd16e02    zgc:55917    MGC55823    Rac1    zgc:55823   

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

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Text2Knowledge ... Yong Huang 2002