The C-Peptide (E7U7F) XP ® Rabbit mAb (BSA and Azide Free) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to INS, and Insulin. This antibody recognizes Homo Sapiens, and Human antigen. The C-Peptide (E7U7F) XP ® Rabbit mAb (BSA and Azide Free) Antibody has been shown to work in the following applications: Immunohistochemistry, and Immunohistochemistry - fixed.