Ca2+-regulated contractility is a key determinant of the quality of muscles. The sarcomeric myofilament proteins are essential players in the contraction of striated muscles. The troponin complex in the actin thin filaments plays a central role in the Ca2+-regulation of muscle contraction and relaxation. https://www.roneverhart.com/Black-flower-Reversable-Tote-Bag-E05728-FRS-RB0/