R&D Systems, a Bio-Techne Brand's Cardiac Troponin I/TNNI3 Antibody is a Mouse monoclonal antibody. The Cardiac Troponin I/TNNI3 Antibody was generated using TNNI3 as the antigen. It reacts with Homo Sapiens, and Human. This antibody has been shown to work in applications such as: Western Blot.