HLA Class I Histocompatibility Antigen, A-1 Alpha Chain

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** HLA class I histocompatibility antigen, A-1 alpha chain protein (365 aa, ~41 kDa) is encoded by the human HLA-A gene. This protein plays a role in the presentation of foreign antigens to the immune system. It is associated with a number of diseases including graft-versus-host disease, hemochromatosis and certain types of cancer.

**Synonyms:** - HLA Class I Histocompatibility Antigen, A*01 Alpha Chain - HLA-A*01 - HLA-A*1 - HLA-A1 - HLA-A1 Antigen - MHC Class I Antigen A*1