Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HESR1BC0018739606HESR-1    CHF2    HRT-1    CHF-2    HERP2    HEY1   
HESR1NM_0122589606CHF2    CHF-2    HERP2    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