Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
H2BFFNM_0210629606H2B.1    H2B/f    HIST1H2BB    602803
H2BFFNT_0075929606H2B.1    H2B/f    HIST1H2BB    602803
H2BFFNG_0013359606H2B.1    H2B/f    HIST1H2BB    602803

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

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Text2Knowledge ... Yong Huang 2002