Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
RHOGAP2BC0113939606ARHGAP2    CHN    CHN1    118423
RHOGAP2NM_0018229606CHN    ARHGAP2    CHN1    118423
RHOGAP2BC03827210090MGC47316    Arhgap22    118423
RhoGAP2NM_0212269606ARHGAP22    118423
RHOGAP2NM_15380010090MGC47316    B230341L19Rik    Arhgap22    118423

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

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Text2Knowledge ... Yong Huang 2002