Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hist2h2beNM_17821410090601831
HIST2H2BEAY1319799606601831
HIST2H2BENM_0035289606H2B    GL105    H2B.1    H2B/q    H2BFQ    601831
HIST2H2BENT_0329629606601831

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

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Text2Knowledge ... Yong Huang 2002