The IL-2Ralpha/CD25 (E4B2Z) XP ® Rabbit mAb (BSA and Azide Free) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to IL2RA. This antibody recognizes Mouse antigen. The IL-2Ralpha/CD25 (E4B2Z) XP ® Rabbit mAb (BSA and Azide Free) Antibody has been shown to work in the following applications: Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.