Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Dm-GBBNM_057992722760A    Gbb    gcn    TGF-b    CG5562    SixtyA    Gbb-60A    Tgfb-60    vgr/60A    tgfb-60A    l(2)60A-J   
Dm-GBBNT_033778722760A    Gbb    gcn    TGF-b    CG5562    SixtyA    Gbb-60A    Tgfb-60    vgr/60A    tgfb-60A    l(2)60A-J   

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

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Text2Knowledge ... Yong Huang 2002