In a skeletal muscle contraction, which of the following undergoes a conformational change when it binds to a specific ion and then uncovers the crossbridge binding site by causing another factor to be moved to the grooves in the actin double helix?

Question

Quizplus · Accepted Answer

Troponin undergoes a conformational change when it binds to calcium ions. This change causes tropomyosin, which is blocking the active sites on actin filaments, to move away, thereby exposing the crossbridge binding sites and allowing myosin heads to attach to actin, initiating muscle contraction.

In a Skeletal Muscle Contraction, Which of the Following Undergoes