The HLA-DR Antibody Pacific Orange from Thermo Fisher Scientific is a Mouse Monoclonal antibody to CD74, CD74 molecule, HLA-DRB1, HLA-DRB3, HLA-DRB4, and HLA-DRB5. This antibody recognizes Homo Sapiens, and Human antigen. The HLA-DR Antibody Pacific Orange has been shown to work in the following applications: Flow Cytometry.