Human leukocyte antigen genes

The Human Leukocyte Antigen genes or HLA genes are a group of genes created by the human leukocyte antigen proteins. HLA genes help the "immune system distinguish the body's own proteins from proteins made by foreign invaders such as viruses and bacteria".https://ghr.nlm.nih.gov/primer/genefamily/hla https://www.merriam-webster.com/dictionary/human%20leukocyte%20antigen It is the human version of the Major Histocompatibility Complex (MHC), which is also found in certain  non-human species.

HLA class I genes
In humans these are: The class I proteins produced from these genes are found on the surface of almost all cells, and display these protein fragments (peptides) to the immune system. The immune system then identifies any proteins it recognizes as foreign (such as viral or bacterial peptides), and triggers the destruction of the cell.https://ghr.nlm.nih.gov/primer/genefamily/hla
 * HLA-A
 * HLA-B
 * HLA-C

HLA class II genes
In humans these are:
 * HLA-DPA1
 * HLA-DPB1
 * HLA-DQA1
 * HLA-DQB1
 * HLA-DRA
 * HLA-DRB1

Learn more

 * Histocompatibility complex - Genetics home reference - US Library of Medicine