Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hist2NM_01354910090H2a-615    Hist2h2aa1   
Hist2XM_14340910090AI448581   

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

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Text2Knowledge ... Yong Huang 2002