Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
fb67b04BC0504817955mad    SBN    wu:fb67b04    madh5   
fb67b04NM_1313687955SBN    mad    cb400    smad5    sb:cb400    wu:fb67b04    madh5   
fb67b04BC0656447955mad    SBN    wu:fb67b04    sb:cb400    cb400    madh5   

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

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Text2Knowledge ... Yong Huang 2002