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As the troponin changes shape (due to binding calcium), it moves the ______ molecule to which it is attached, thus exposing the active sites on the G-actin molecules.

Respuesta :

As the troponin changes shape (due to binding calcium), it moves the tropomysin molecule to which it is attached.

Once calcium binds to troponin and causes it to change it shape, it removes the tropomysin away from the binding site therefore effectively exposing the myosin binding sites.

This occurs during muscle contraction (movement) in the skeletal muscles.

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