HLA-DR alpha-Chains

**Definition:** Transmembrane proteins that form the alpha subunits of the HLA-DR antigens. They are also referred to as the HLA-DR heavy chains.

**Tree numbers:** - D09.400.430.890.509.400.440.100 - D12.776.395.550.509.400.440.100 - D12.776.543.550.440.400.440.100 - D23.050.301.500.400.400.440.100 - D23.050.301.500.450.400.440.222 - D23.050.705.552.410.400.440.100 - D23.050.705.552.450.400.440.222

**Synonyms:** - HLA-DRA - HLA-DR alpha-Chain - HLA-DR alpha - MHC Class II Antigen DRA - HLA-DR Heavy Chain - HLA Class II Histocompatibility Antigen, DR alpha Chain