Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CBX5BC0068219606HP1    HP1-ALPHA    HP1Hs-alpha   
CBX5NM_0121179606HP1    HP1-ALPHA    HP1Hs-alpha   
Cbx5NT_03962110090
Cbx5BC00470710090
CBX5NT_0294199606
Cbx5NM_00762610090HP1    Hp1a    2610029O15Rik   

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

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Text2Knowledge ... Yong Huang 2002