B*5101-β2M with bound peptide major histocompatibility complex (human), class I, B51 Split antigens HLA-B51, HLA-B52 HLA-B5 (B5) is an HLA-B serotype. B5 is a broad antigen serotype that recognizes the B51 and B52 split antigen serotypes.

Serotype + B5, B51, B52 serotype recognition of some HLA B*51 and B*52 allele-group gene products B*51 B51 B5 B52 Sample allele % % % size (N) 5101 96 1 5 1899 5102 73 3 6 218 5104 83 17 6 ' B*52 B52 B5 B51 Sample allele % % % size (N) 5201 82 2 7 2823

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