Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Myhn-1NM_02241010090Myhn1    D0Jmb2    TU-72.6    E030044M24Rik    Myh9   
Myhn-1NM_18132710090Myhn1    D0Jmb2    TU-72.6    E030044M24Rik    Myh9   

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

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Text2Knowledge ... Yong Huang 2002