The CD4 (D7D2Z) Rabbit mAb (BSA and Azide Free) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to CD4. This antibody recognizes Mouse, Rat, and Hamster antigen. The CD4 (D7D2Z) Rabbit mAb (BSA and Azide Free) Antibody has been shown to work in the following applications: Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.