Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MUC9NM_02880110090MUC5    A130042M24    2300002I04Rik    Muc5b   
muc9NM_00769610090OGP    MOGP    Chit5    120kDa    AU016433    AU019448    Ovgp1   
MUC9NM_0025579606OVGP1   

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

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Text2Knowledge ... Yong Huang 2002