Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
H2A/aNM_0210529606H2A.1    H2A.2    H2AFA    HIST1H2AE   
H2A/aNT_0075929606H2A.1    H2A.2    H2AFA    HIST1H2AE   
H2A/aNG_0013359606H2A.1    H2A.2    H2AFA    HIST1H2AE   

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

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Text2Knowledge ... Yong Huang 2002