Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hist2h3ca1NM_17821610090H3f2    H3-615    Hist2h3c1   
Hist2h3ca1NM_05404510090H3-614    M32461    H3.2-614    Hist2h3ca2    Hist2h3c2   
Hist2h3ca1NM_01946910090H3f2    H3-615    Hist2h3c1   
Hist2h3ca1BC01527010090Hist2h3ca2    H3-614    H3.2-614    Hist2h3c2   

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

Google

Text2Knowledge ... Yong Huang 2002