Troponin complex subunits
troponin complex subunits
Troponin is a complex of three regulatory proteins ( troponin C, troponin I, and troponin T ) that is integral to muscle contraction in skeletal muscle and cardiac muscle, but not smooth muscle.  Discussions of troponin often pertain to its functional characteristics and/or to its usefulness as a diagnostic marker or therapeutic target for various heart disorders in particular as a highly specific marker for myocardial infarction or heart muscle cell death.