HLA Alleles Numbers

Assigned as of September 2018

The numbers below represent the number of named alleles for each gene. This number includes alleles that have been named but whose sequences are still confidential. This means that the number of sequences found in some files on this site may differ from the number of sequences indicated in this table. Details of the alleles that are still confidential can be seen in the latest version reports on the IPD-IMGT/HLA Database web site. The numbers below do not include the names of any deleted alleles - further details of deleted alleles can be found here. If you wish to cite these numbers in a publication, please see our citations page for further details.


Numbers of HLA Alleles
HLA Class I Alleles 14,800
HLA Class II Alleles 5,288
HLA Alleles 20,088
Other non-HLA Alleles 184
Number of Confidential Alleles 3
HLA Class I
Gene A B C E F G
Alleles 4,638 5,590 4,374 27 31 61
Proteins 3,172 3,923 2,920 8 6 19
Nulls 224 169 171 1 0 3
HLA Class I - Pseudogenes
Gene H J K L N P S T U V W Y
Alleles 12 9 6 5 5 5 7 8 5 3 11 3
Proteins 0 0 0 0 0 0 0 0 0 0 0 0
Nulls 0 0 0 0 0 0 0 0 0 0 0 0
HLA Class II
Gene DRA DRB DQA1 DQB1 DPA1 DPA2 DPB1 DPB2 DMA DMB DOA DOB
Alleles 7 2,639 100 1,316 73 5 1,097 6 7 13 12 13
Proteins 2 1,908 36 878 32 2 728 3 4 7 3 5
Nulls 0 84 4 35 0 0 34 0 0 0 1 0
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 2,300 1 175 83 68 3 2 1 6
Proteins 1,644 0 142 63 59 0 0 0 0
Nulls 62 0 7 11 4 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 107 47 12 12
Proteins 4 82 30 6 5
Nulls 0 2 2 1 0