HLA-B5 explained

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.^[1]

Serotype

B5, B51, B52 serotype recognition of some HLA B*51 and B*52 allele-group gene products^[2]

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

Notes and References

1. 2848993 . 2010 . Marsh . S. G. . Nomenclature for factors of the HLA system, 2010 . Tissue Antigens . 75 . 4 . 291–455 . Albert . E. D. . Bodmer . W. F. . Bontrop . R. E. . Dupont . B. . Erlich . H. A. . Fernández-Viña . M. . Geraghty . D. E. . Holdsworth . R. . Hurley . C. K. . Lau . M. . Lee . K. W. . Mach . B. . Maiers . M. . Mayr . W. R. . Müller . C. R. . Parham . P. . Petersdorf . E. W. . Sasazuki . T. . Strominger . J. L. . Svejgaard . A. . Terasaki . P. I. . Tiercy . J. M. . Trowsdale . J. . 20356336 . 10.1111/j.1399-0039.2010.01466.x .
2. Robinson J, Waller MJ, Fail SC, Marsh SG . The IMGT/HLA and IPD databases . Hum. Mutat. . 27 . 12 . 1192–9 . 2006 . 16944494 . 10.1002/humu.20406 . free .