Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
btn/MEOXNM_1700267227CG5264    1261/13    btn   
btn/MEOXNT_0337777227CG5264    1261/13    btn   

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

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Text2Knowledge ... Yong Huang 2002