 HLA-DR

HLA-DR is an MHC class II cell surface receptor encoded by the human leukocyte antigen complex on chromosome 6 region 6p21.31.The complex of HLA-DR (Human Leukocyte Antigen – DR isotype ) and peptide, generally between 9 and 30 amino acids in length, constitutes a ligand for the T-cell receptor (TCR).