Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
His2bNM_0582347227H2B    dH2B    DmeH2b    HisC    H2[[B]]   
His2BAABU010001457227His2B:CG40461   
His2BNG_0008267227
His2bM2548710090

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

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Text2Knowledge ... Yong Huang 2002