Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Myhn1NM_02241010090D0Jmb2    Myhn-1    TU-72.6    E030044M24Rik    Myh9   
Myhn1NM_18132710090D0Jmb2    Myhn-1    TU-72.6    E030044M24Rik    Myh9   

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

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