HLA Alleles Numbers

Assigned as of December 2023

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 26,610
HLA Class II Alleles 11,398
HLA Alleles 38,008
Other non-HLA Alleles 901
Number of Confidential Alleles 0
HLA Class I
Gene A B C E F G
Alleles 8,098 9,656 8,084 352 91 158
Proteins 4,741 5,745 4,470 140 17 48
Nulls 420 339 362 10 2 6
HLA Class I - Pseudogenes
Gene H J K L N P S T U V W Y
Alleles 72 33 7 6 5 5 7 9 7 4 13 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 DQB2 DPA1 DPA2 DPB1 DPB2 DMA DMB DOA DOB
Alleles 65 4,581 722 42 2,510 41 639 6 2,486 7 59 82 93 63
Proteins 15 3019 351 11 1,524 9 311 0 1,447 0 9 9 14 16
Nulls 0 200 21 0 111 1 26 0 130 0 0 0 1 0
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 3,628 1 488 250 201 4 2 1 6
Proteins 2,343 0 369 157 150 0 0 0 0
Nulls 124 0 24 27 25 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 531 246 12 106
Proteins 4 280 47 6 13
Nulls 0 8 25 1 0