Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HHR6BBC0084709606RAD6B    UBC2    HR6B    E2-17kDa    UBE2B   
HHR6BBC0084049606RAD6B    UBC2    HR6B    E2-17kDa    UBE2B   
HHR6BBC0059799606RAD6B    UBC2    HR6B    E2-17kDa    UBE2B   
HHR6BNM_0033379606HR6B    UBC2    RAD6B    E2-17kDa    UBE2B   

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

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Text2Knowledge ... Yong Huang 2002