Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MGC56294BC0478577955Tnni2    zgc:56294   
MGC56294NM_2010937955Tnni2    zgc:56294   

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

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Text2Knowledge ... Yong Huang 2002