Clone 169-1B5.2 is a mouse monoclonal antibody specific to the human gene, HLA-DRA, or Major histocompatibility complex, class II, DR alpha. Another name for the gene is HLA-DR. Suppliers have reported additional species reactivites for the target of this clone, including bovine and feline. Indicated applications for antibody clone 169-1B5.2 include flow cytometry and immunofluorescence.