The PDI (C81H6) Rabbit mAb (BSA and Azide Free) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to P4HB. This antibody recognizes Homo Sapiens, Human, Mouse, Rat, and Non-Human Primate antigen. The PDI (C81H6) Rabbit mAb (BSA and Azide Free) Antibody has been shown to work in the following applications: Immunocytochemistry, Immunofluorescence, Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.