Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
zgc:55978NM_1998797955fi38c03    mgrn1   
zgc:55978BC0480697955fi38c03    mgrn1   

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

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Text2Knowledge ... Yong Huang 2002