Your Query returns 8 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
H2A.2NM_0035169606H2A    H2A/O    H2AFO    H2a-615    HIST2H2AA   
H2A.2NM_0210529606H2A.1    H2A/a    H2AFA    HIST1H2AE   
H2A.2NT_0075929606H2A.1    H2A/a    H2AFA    HIST1H2AE   
H2A.2NG_0013359606H2A.1    H2A/a    H2AFA    HIST1H2AE   
H2A.2L188935911
H2A.2AJ49485134765
H2a.2X8032710093
H2a.2X8033010030

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

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Text2Knowledge ... Yong Huang 2002