Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hist1h1bNM_02003410090H1B    H1.5    H1f5    H1s-3    142711
HIST1H1BAF5313049606142711
HIST1H1BNM_0053229606H1    H1.5    H1F5    142711
Hist1h1bNT_03957810090142711
HIST1H1BNG_0000099606H1    H1.5    H1F5    142711

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

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Text2Knowledge ... Yong Huang 2002