A few forms of troponins exist—troponin I, troponin T, and troponin C. Every single subunit has a unique functionality: Troponin T binds the troponin elements to tropomyosin, troponin I inhibits the conversation of myosin with actin, and troponin C consists of the binding web pages for Ca2+ that can help initiate contraction. [one]Topanwin: Situs