Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
regg1NM_1657357227dt1    Ect1    Eiger    darth    CG12919    egr   
regg1NM_2060697227dt1    Ect1    Eiger    darth    CG12919    egr   
regg1NT_0337787227dt1    Ect1    Eiger    darth    CG12919    egr   

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

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Text2Knowledge ... Yong Huang 2002