Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HLA-B*4201 variantAH0126119606HLA-B   
HLA-B*4201 variantAY2176669606HLA-B   
HLA-B*4201 variantAY2176679606HLA-B   
HLA-B*4201 variantAH0111679606HLA-B   
HLA-B*4201 variantAY0501979606HLA-B   
HLA-B*4201 variantAY0501989606HLA-B   

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

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Text2Knowledge ... Yong Huang 2002