The calcium ions involved in skeletal muscle contraction bind to a(n)______ subunit.

Question

Quizplus · Accepted Answer

The calcium ions involved in skeletal muscle contraction bind to a subunit of the protein complex troponin, which is located on the actin filaments of muscle fibers. The binding of calcium ions to troponin causes a conformational change that exposes myosin binding sites on the actin filaments, allowing for the formation of cross-bridges between actin and myosin and the initiation of muscle contraction. None of the other choices are directly involved in the binding of calcium ions.

The Calcium Ions Involved in Skeletal Muscle Contraction Bind to A(n)______