Cell Signaling Technology's Arginase-1 (E4U1I) Mouse mAb (BSA and Azide Free) is a Mouse monoclonal antibody. The Arginase-1 (E4U1I) Mouse mAb (BSA and Azide Free) Antibody was generated using Arg1 as the antigen. It reacts with Homo Sapiens, and Human. This antibody has been shown to work in applications such as: Immunohistochemistry, Immunohistochemistry - fixed, and Western Blot.