HLA DR, like other MHC class II molecules, is a transmembrane glycoprotein composed of an alpha chain (36 kDa) and a beta chain (27 kDa). It is expressed primarily on antigen presenting cells such as B lymphocytes, monocytes, macrophages, thymic epithelial cells and activated T lymphocytes. Three loci, DR, DQ and DP, encode the major expressed products of the human class II region. The human MHC class II molecules bind intracellularly processed peptides and present them to T-helper cells. They therefore have a critical role in the initiation of the immune response.
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Protein Aliases: Clone P2-beta-3; DR-16; DRB1; DRw10; DW2.2/DR2.2; FLJ75017; FLJ76359; HLA class II histocompatibility antigen, DR-1 beta chain; HLA class II histocompatibility antigen, DRB1-15 beta chain; HLA class II histocompatibility antigen, DRB1-16 beta chain; HLA class II histocompatibility antigen, DRB1-3 chain; HLA-DR1B; HLA-DRB; HLA-DRB1*; human leucocyte antigen DRB1; lymphocyte antigen DRB1; MHC class II antigen; MHC class II antigen DRB1*15; MHC class II antigen DRB1*16; MHC class II antigen DRB1*3; MHC class II HLA-DR beta 1 chain; MHC class II HLA-DR-beta cell surface glycoprotein; MHC class II HLA-DRw10-beta; SS1; XXbac-BPG161M6.1
Gene Aliases: DRB1; DRw10; HLA-DR1B; HLA-DRB; HLA-DRB1; HLA-DRB2; SS1
UniProt ID: (Human) P01911
Entrez Gene ID: (Human) 3123