Background：HLA-DR is a heterodimeric cell surface glycoprotein comprised of a 36 kD a （heavy） chain and a 27 kD b （light） chain. It is expressed on B cells, activated T cells, monocytes/macrophages, dendritic cells, and other non-professional APCs. In conjunction with the CD3/TCR complex and CD4 molecules, HLA-DR is critical for efficient peptide presentation to CD4+ T cells.
仕様
Synonyms：HLA class II histocompatibility antigen DR alpha/ DRB1-15 beta chain,MHC class II antigen DRA,HLA-DRA1/DRB1,DRA/DRB1
