Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ARHGAP2BC0113939606CHN    RHOGAP2    CHN1    118423
ARHGAP2NM_0018229606CHN    RHOGAP2    CHN1    118423
ARHGAP2NM_029716100900710001E19Rik    1700112L09Rik    2900046J01Rik    Chn1    118423
ARHGAP2NM_175752100900710001E19Rik    1700112L09Rik    2900046J01Rik    Chn1    118423

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

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Text2Knowledge ... Yong Huang 2002