Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ATPsyn-betaAY1183677227
ATPsyn-betaAE0038467227
ATPsyn-betaNC_0043537227ATPB    CG8189    CG11154    ATPsyn-b   
ATPsyn-betaNM_1668087227ATPB    CG8189    CG11154    ATPsyn-b   
ATPsyn-betaNM_1668097227ATPB    CG8189    CG11154    ATPsyn-b   

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

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Text2Knowledge ... Yong Huang 2002