Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hook2BC0556487955MGC66419    zgc:66419   
Hook2NM_2011117955MGC66419    zgc:66419   
Hook2NM_13325510090MGC28586    A630054I03Rik   
HOOK2BC0124439606HK2   
HOOK2AF0449249606
HOOK2NM_0133129606HK2   
Hook2BC00222610090MGC28586   
HOOK2NT_0112959606

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

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Text2Knowledge ... Yong Huang 2002