Cross Bridge Cycle

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Last updated 8:02 PM on 9/30/26
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5 Terms

1
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Step 1

Attach

Myosin binds actin.

2
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Step 2

Pull

Power stroke → actin moves toward center.

3
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Step 3

ATP binds

Myosin detaches from actin.

4
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Step 4

ATP is hydrolyzed

ATP → ADP + Pi → myosin head is energized

5
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Step 5

Attach again

Myosin can bind to actin again if Ca²⁺ is present.