Troponin
= Troponin
A calcium-responsive regulatory protein complex on thin muscle filaments. Changes in its occupancy and conformation couple calcium signals to movement of <tropomyosin> and accessibility of myosin-binding sites on actin.
= Troponin
A calcium-responsive regulatory protein complex on thin muscle filaments. Changes in its occupancy and conformation couple calcium signals to movement of <tropomyosin> and accessibility of myosin-binding sites on actin.