The human leukocyte antigen (HLA) complex is a gene complex located on the short arm of human chromosome 6. The human version of the major histocompatibility complex (MHC) helps the immune system distinguish the host cells from invaders. It is the most polymorphic locus in the human genome, and has been implicated in many pathologies including autoimmunity disorders and cancer. This product is for research use only. It is not approved for human or animal use, or for application in in vitro diagnostic procedures.