Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MGC55951BC0455047955Tm1    zgc:55951   
MGC55951NM_2009347955Tm1    zgc:55951   

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

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Text2Knowledge ... Yong Huang 2002