16. Which of the following occur during the actinomyosin contractile cycle?

16. Which of the following occur during the actinomyosin contractile cycle?

A. ATP is hydrolyzed prior to myosin binding to actin

B. Release of a phosphate from the myosin active site triggers a conformational change

C. ATP binding promotes release of actin by the myosin head

D. The myosin head is bound during the power stroke 

E. All of the above

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