Statistics

Table showing the number of alleles, proteins and nulls in the IPD-IMGT/HLA Database named as of September 2025.

Numbers of HLA Alleles
HLA class I alleles 29475
HLA class II alleles 13521
HLA alleles 42996
Other non-HLA alleles 1032
Number of confidential alleles 0

HLA class I
Gene A B C E F G
Alleles 8949 10680 8944 385 126 194
Proteins 5229 6358 4934 144 28 61
Nulls 476 386 412 10 3 6

HLA class I - Pseudogenes
Gene H J K L N P R S T U V W Y
Alleles 96 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 127 5137 966 42 2924 41 877 6 2911 7 89 138 147 109
Proteins 19 3328 472 11 1736 9 397 0 1670 0 10 9 17 20
Nulls 0 236 24 0 126 1 35 0 151 0 0 0 1 1

HLA class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9
Alleles 3892 1 645 335 251 4 2 1 6
Proteins 2523 0 441 192 172 0 0 0 0
Nulls 140 0 32 35 29 0 0 0 0

Other non-HLA Genes
Gene HFE MICA MICB TAP1 TAP2
Alleles 6 589 312 19 106
Proteins 4 279 53 11 13
Nulls 0 9 25 1 0

Last updated: 08-Oct-2025