Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Herp2NM_01042310090HRT1    hesr-1    Hey1   
HERP2BC0018739606HESR-1    CHF2    HESR1    HRT-1    CHF-2    HEY1   
HERP2NM_0122589606CHF2    CHF-2    HESR1    HRT-1    HESR-1    HEY1   

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

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Text2Knowledge ... Yong Huang 2002