The Myeloperoxidase (E1E7I) XP ® Rabbit mAb (BSA and Azide Free) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to MPO, and myeloperoxidase. This antibody recognizes Homo Sapiens, and Human antigen. The Myeloperoxidase (E1E7I) XP ® Rabbit mAb (BSA and Azide Free) Antibody has been shown to work in the following applications: Immunocytochemistry, Immunofluorescence, Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.