Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
zgc:66419BC0556487955MGC66419    Hook2   
zgc:66419NM_2011117955Hook2    MGC66419   

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

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Text2Knowledge ... Yong Huang 2002