Anti-HLA-DRA1 antibodies enable researchers to detect and measure the HLA-DRA1 antigen in biological samples. This target is a reported synonym of the HLA-DRA gene, which encodes major histocompatibility complex, class II, DR alpha. This protein is known to function in adaptive immune responses, among other biological roles. The human version of HLA-DRA1 has a canonical amino acid length of 254 residues and a protein mass of 28.6 kilodaltons. It is reported to be localized in the ER, lysosomes, and cell membrane of cells and widely expressed in many tissue types. HLA-DRA1 is also used as a cellular marker for characterizing microglia, myeloid-derived suppressor cells, basophils and mesenchymal stem cells. This target antigen may also be known as HLA-DRA1. These HLA-DRA1 antibodies are widely used in Western Blot experiments, among other applications.