HLA Alleles Numbers

Assigned as of September 2024

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 27,717
HLA Class II Alleles 11,910
HLA Alleles 39,627
Other non-HLA Alleles 996
Number of Confidential Alleles 0
HLA Class I
Gene A B C E F G
Alleles 8,472 10,183 8,570 372 106 176
Proteins 4,949 6,073 4,723 141 19 52
Nulls 445 364 385 10 2 6
HLA Class I - Pseudogenes
Gene H J K L N P R S T U V W Y
Alleles 82 33 7 6 5 5 2 7 9 7 4 13 3
Proteins 0 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 0
HLA Class II
Gene DRA DRB DQA1 DQA2 DQB1 DQB2 DPA1 DPA2 DPB1 DPB2 DMA DMB DOA DOB
Alleles 78 4,752 847 42 2,771 41 740 6 2,762 7 60 85 113 71
Proteins 17 3139 407 11 1,658 9 361 0 1,583 0 9 9 16 17
Nulls 0 210 21 0 122 1 31 0 145 0 0 0 1 1
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 3,751 1 514 264 209 4 2 1 6
Proteins 2,422 0 394 167 156 0 0 0 0
Nulls 133 0 25 27 25 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 570 295 19 106
Proteins 4 281 49 11 13
Nulls 0 9 25 1 0