Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mmubc9NM_01166510090UBC9    Ubce9    5830467E05Rik    Ube2i   
Mmubc9BC03763510090UBC9    5830467E05Rik    Ube2i   

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

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Text2Knowledge ... Yong Huang 2002