Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HLA-B*5501 variantAH0109939606HLA-B   
HLA-B*5501 variantAY0426749606HLA-B   
HLA-B*5501 variantAY0426759606HLA-B   
HLA-B*5501 variantX944829606

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

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Text2Knowledge ... Yong Huang 2002