Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hist2h3c2NM_05404510090H3-614    M32461    H3.2-614    Hist2h3ca1    Hist2h3ca2   
Hist2h3c2NT_08025010090
Hist2h3c2BC01527010090Hist2h3ca2    H3-614    H3.2-614    Hist2h3ca1   

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

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Text2Knowledge ... Yong Huang 2002