Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HIST2H2AAAY1319719606142720
HIST2H2AANM_0035169606H2A    H2A.2    H2A/O    H2AFO    H2a-615    142720
HIST2H2AANT_0329629606142720

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

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Text2Knowledge ... Yong Huang 2002