TNNT2 functions as part of the Troponin complex with its C-terminal region of TNT apart of the globular troponin complex domain.
Cardiac muscle troponin T (cTnT) is a protein that in humans is encoded by the TNNT2 gene. As part of the Troponin complex, the function of cTnT is to regulate muscle contraction. The C-terminal region of TnT constitutes part of the globular troponin complex domain, and participates in employing the calcium sensitivity of strong myosin crossbridge binding to the thin filament. 
