HLA Alleles Numbers

Assigned as of March 2019

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 16,200
HLA Class II Alleles 6,162
HLA Alleles 22,548
Other non-HLA Alleles 186
Number of Confidential Alleles 20
HLA Class I
Gene A B C E F G
Alleles 5,018 6,096 4,852 30 44 68
Proteins 3,398 4,248 3,193 9 6 19
Nulls 272 204 222 1 0 3
HLA Class I - Pseudogenes
Gene H J K L N P S T U V W Y
Alleles 25 9 6 5 5 5 7 8 5 3 11 3
Proteins 0 0 0 0 0 0 0 3 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 2,923 149 1,561 106 5 1,360 6 7 13 12 13
Proteins 2 2,087 53 1,046 38 2 895 3 4 7 3 5
Nulls 0 105 5 58 1 0 69 0 0 0 1 0
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 2,479 1 225 121 85 3 2 1 6
Proteins 1,759 0 175 83 70 0 0 0 0
Nulls 76 0 8 13 8 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 109 47 12 12
Proteins 4 82 30 6 5
Nulls 0 3 2 1 0