HLA-DR Serological Subtypes

**Definition:** HLA-DR antigen subtypes that have been classified according to their affinity to specific ANTIBODIES. The DNA sequence analyses of HLA-DR ALPHA-CHAINS and HLA-DR BETA-CHAINS has for the most part revealed the specific alleles that are responsible for each serological subtype.

**Tree numbers:** - D09.400.430.890.509.400.440.400 - D12.776.395.550.509.400.440.400 - D12.776.543.550.440.400.440.400 - D23.050.301.500.400.400.440.400 - D23.050.301.500.450.400.440.389 - D23.050.705.552.410.400.440.389 - D23.050.705.552.450.400.440.389