Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hist2h3c1NM_17821610090H3f2    H3-615    Hist2h3ca1   
Hist2h3c1NM_01946910090H3f2    H3-615    Hist2h3ca1   
Hist2h3c1NT_08025010090

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

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Text2Knowledge ... Yong Huang 2002