HLA Class II Histocompatibility Antigen, DRB1-4 Beta Chain Protein

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

**Definition:** HLA class II histocompatibility antigen, DRB1-4 beta chain protein (266 aa, ~30 kDa) is encoded by the human HLA-DRB1 gene. This protein is involved in both antigen presentation to regulatory T cells and in the immune response. The antigen is frequently typed for bone marrow and kidney transplantation procedures.

**Synonyms:** - DR-4 - DR4 - DR4 - HLA Class II Histocompatibility Antigen, DRB1-4 Beta Chain - HLA-DR4 - HLA-DR4 Antigen - MHC Class I Antigen DRB1*4