Your Query returns 6 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HR6ANM_01966810090HHR6A    Ube2a   
HR6ABC02605310090HHR6A    Ube2a   
HR6AAH0100759913
HR6AAF3165359913
HR6AAF3165369913
HR6AAF4557469606

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

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Text2Knowledge ... Yong Huang 2002