Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
mtco2NC_0023337955COX2   
MTCO2NC_0018079606COX2   
MTCO2NC_0015679913COX2   
MTCO2NM_1737059606COII   

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

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