Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HLA-B*27 variantAH0062939606HLA-B   
HLA-B*27 variantAF0727639606HLA-B   
HLA-B*27 variantAF0727649606HLA-B   
HLA-B*27 variantAH0090759606HLA-B   
HLA-B*27 variantAF1901469606HLA-B   
HLA-B*27 variantAF1901479606HLA-B   

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

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Text2Knowledge ... Yong Huang 2002