HLA Alleles Numbers

Assigned as of December 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 28,409
HLA Class II Alleles 12,594
HLA Alleles 41,003
Other non-HLA Alleles 1023
Number of Confidential Alleles 4
HLA Class I
Gene A B C E F G
Alleles 8,556 10,346 8,657 376 115 176
Proteins 5,004 6,172 4,776 141 22 52
Nulls 449 370 388 10 3 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 4,812 872 42 2,813 41 765 6 2,795 7 62 100 121 80
Proteins 17 3,168 448 11 1,682 9 373 0 1,611 0 9 9 16 17
Nulls 0 215 21 0 122 1 33 0 145 0 0 0 1 1
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 3,787 1 523 273 215 4 2 1 6
Proteins 2,443 0 399 169 157 0 0 0 0
Nulls 135 0 28 27 25 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 585 307 19 106
Proteins 4 278 49 11 13
Nulls 0 9 25 1 0