Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
zgc:55388BC0453287955fi24f03    Ptpn11    wu:fi24f03   
zgc:55388NM_1998467955Ptpn11    fi24f03    wu:fi24f03   

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

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Text2Knowledge ... Yong Huang 2002