Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Ndufb2NM_026612100908kDa    AGGG    1810011O01Rik   
NDUFB2Y160009606
NDUFB2NM_0045469606AGGG    CI-AGGG   
NDUFB2NM_1758289913AGGG   
Ndufb2NT_03934110090
Ndufb2BC013510100908kDa    AGGG   
NDUFB2NT_0079149606
NDUFB2NT_0795969606

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

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Text2Knowledge ... Yong Huang 2002