HLA Alleles Numbers

Assigned as of September 2017

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 12,631
HLA Class II Alleles 4,700
HLA Alleles 17,331
Other non-HLA Alleles 178
Number of Confidential Alleles 8
HLA Class I
Gene A B C E F G
Alleles 3,997 4,859 3,605 26 26 56
Proteins 2,792 3,518 2,497 8 5 18
Nulls 186 147 131 1 0 2
HLA Class I - Pseudogenes
Gene H J K L P T U V W X Y
Alleles 12 9 6 5 5 8 0 3 11 0 3
Proteins 0 0 0 0 0 3 0 0 0 0 0
Nulls 0 0 0 0 0 0 0 0 0 0 0
HLA Class II
Gene DRA DRB DQA1 DQB1 DPA1 DPA2 DPB1 DPB2 DMA DMB DOA DOB
Alleles 7 2,395 92 1,152 56 5 942 6 7 13 12 13
Proteins 2 1751 35 779 26 2 655 3 4 7 3 5
Nulls 0 66 3 31 0 0 22 0 0 0 1 0
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 2,122 1 145 66 54 3 2 1 1
Proteins 1,532 0 119 52 48 0 0 0 0
Nulls 52 0 4 7 3 0 0 0 0
Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 106 42 12 12
Proteins 4 82 28 6 5
Nulls 0 2 2 1 0