Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ARHGAP1BC0181189606CDC42GAP    RHOGAP    RHOGAP1   
ARHGAP1AY4028199606
ARHGAP1AY4028209598
ARHGAP1AY40282110090
ARHGAP1NM_0043089606RHOGAP    RHOGAP1    CDC42GAP   
ARHGAP1NT_0092379606
Arhgap1NM_14612410090MGC7050    B230365D05Rik   
Arhgap1BC00659210090MGC7050   
Arhgap1BC01032810090MGC7050   

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

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Text2Knowledge ... Yong Huang 2002