Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CD227NM_01360510090EMA    Muc-1    Muc1   
CD227NM_0024569606EMA    PEM    PUM    MUC1   
CD227NM_1827419606EMA    PEM    PUM    MUC1   
CD227BC00544110090EMA    Muc1   

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

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Text2Knowledge ... Yong Huang 2002