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What molecule binds to actin to open binding sites so myosin heads can attach?

1 Answer

2 votes

Answer:

Troponin

Step-by-step explanation:

Troponin binds to tropomyosin and helps to position it on the actin molecule; it also binds calcium ions. To enable a muscle contraction, tropomyosin must change conformation, uncovering the myosin-binding site on an actin molecule and allowing cross-bridge formation.

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