HLA-DRB1 Chains

**Definition:** A subtype of HLA-DRB beta chains that includes over one hundred allele variants. The HLA-DRB1 subtype is associated with several of the HLA-DR SEROLOGICAL SUBTYPES.

**Tree numbers:** - D09.400.430.890.509.400.440.200.010 - D12.776.395.550.509.400.440.200.010 - D12.776.543.550.440.400.440.200.010 - D23.050.301.500.400.400.440.200.010 - D23.050.301.500.450.400.440.333.500 - D23.050.705.552.410.400.440.200.010 - D23.050.705.552.450.400.440.333.500

**Synonyms:** - HLA DRB1 - HLA-DRB1 - HLA-DRB1 Antigen