Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MGC9051BC0106419606GABRB3   
MGC9051NM_0008149606GABRB3   
MGC9051NM_0219129606GABRB3   

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

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Text2Knowledge ... Yong Huang 2002