HLA Alleles Numbers

Assigned as of June 2022

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 24,703
HLA Class II Alleles 9,719
HLA Alleles 34,422
Other non-HLA Alleles 655
Number of Confidential Alleles 4
HLA Class I
Gene A B C E F G
Alleles 7,562 9,000 7,513 311 56 104
Proteins 4,399 5,414 4,157 121 11 35
Nulls 392 312 324 8 0 5
HLA Class I - Pseudogenes
Gene H J K L N P S T U V W Y
Alleles 67 32 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 DQA2 DQB1 DPA1 DPA2 DPB1 DPB2 DMA DMB DOA DOB
Alleles 32 4,149 483 40 2,278 455 5 2,067 6 58 71 15 60
Proteins 5 2,782 232 11 1,433 202 0 1,244 0 9 9 4 15
Nulls 0 183 12 0 99 18 0 104 0 0 0 1 0
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 3,298 1 436 221 181 3 2 1 6
Proteins 2,178 0 325 142 137 0 0 0 0
Nulls 114 0 22 25 22 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 388 237 12 12
Proteins 4 192 42 6 5
Nulls 0 6 25 1 0