HLA Class II Histocompatibility Antigen, DR Alpha Chain

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

**Definition:** HLA class II histocompatibility antigen, DR alpha chain (254 aa, ~29 kDa) is encoded by the human HLA-DRA gene. This protein plays a role in the presentation of antigen for recognition by CD4 T-cells.

**Synonyms:** - Histocompatibility Antigen HLA-DR Alpha - MHC Class II Antigen DRA