HLA-A Antigens

**Definition:** Polymorphic class I human histocompatibility (HLA) surface antigens present on almost all nucleated cells. At least 20 antigens have been identified which are encoded by the A locus of multiple alleles on chromosome 6. They serve as targets for T-cell cytolytic responses and are involved with acceptance or rejection of tissue/organ grafts.

**Tree numbers:** - D09.400.430.890.489.400 - D12.776.395.550.489.400 - D12.776.543.550.439.400 - D23.050.301.500.100.400 - D23.050.301.500.450.370 - D23.050.705.552.100.400 - D23.050.705.552.450.370

**Synonyms:** - HLA-A - Antigens, HLA-A