HLA Alleles Numbers

Assigned as of September 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 25,019
HLA Class II Alleles 10,201
HLA Alleles 35,220
Other non-HLA Alleles 796
Number of Confidential Alleles 0
HLA Class I
Gene A B C E F G
Alleles 7,644 9,097 7,609 342 59 110
Proteins 4,450 5,471 4,218 139 11 36
Nulls 397 318 330 10 0 6
HLA Class I - Pseudogenes
Gene H J K L N P S T U V W Y
Alleles 67 33 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 DQB2 DPA1 DPA2 DPB1 DPB2 DMA DMB DOA DOB
Alleles 43 4,258 508 40 2,330 25 491 5 2,221 6 58 71 92 60
Proteins 5 2,823 244 11 1,455 8 223 0 1,325 0 9 9 14 15
Nulls 0 185 13 0 102 0 21 0 113 0 0 0 1 0
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 3,389 1 446 223 187 3 2 1 6
Proteins 2,203 0 334 144 142 0 0 0 0
Nulls 115 0 22 25 23 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 529 237 12 12
Proteins 4 280 42 6 5
Nulls 0 8 25 1 0