HLA Alleles Numbers

Assigned January 2012

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 held as confidential, this means that the number of sequences found in some files on this site may differ from the numbers printed in this table. Details of which alleles are still confidential can be seen in the latest version reports on the IMGT/HLA Database web site. The numbers below do not include the names of any deleted alleles, further details of which can be found in a separate report.  If you wish to cite these numbers in a publication, please see our citations page for further details on how you can do this.


Numbers of HLA Alleles
HLA Class I Alleles 5,518
HLA Class II Alleles 1,612
HLA Alleles 7,130
Other non-HLA Alleles 139
Number of Confidential Alleles 5
HLA Class I
Gene A B C E F G    
Alleles 1,757 2,338 1,304 10 22 47
Proteins 1,290 1,795 946 3 4 15
Nulls 87 73 35 0 0 2
HLA Class I - Pseudogenes
Gene H J K L P T U V W X
Alleles 12 9 6 5 5 0 0 3 0 0
Proteins 0 0 0 0 0 0 0 0 0 0
Nulls 0 0 0 0 0 0 0 0 0 0
HLA Class II
Gene DRA DRB DQA1 DQB1 DPA1 DPB1 DMA DMB DOA DOB
Alleles 7 1,166 47 162 33 152 7 13 12 13
Proteins 2 873 29 113 16 131 4 7 3 5
Nulls 0 20 1 1 0 3 0 0 1 0
HLA Class II - DRB Alleles
Gene DRB1 DRB2 DRB3 DRB4 DRB5 DRB6 DRB7 DRB8 DRB9  
Alleles 1,052 1 57 15 19 3 2 1 1
Proteins 803 0 46 8 16 0 0 0 0
Nulls 15 0 0 3 2 0 0 0 0
Other non-HLA Genes
Gene MICA MICB TAP1 TAP2     
Alleles 80 33 12 12
Proteins 63 23 6 5
Nulls 2 2 1 0