The given figure represents the cross-bridge cycle in skeletal muscle. What does step $B$ in the figure represent?
- AAttachment of myosin head to actin forming a cross-bridge.
- BRelease of phosphate. Myosin changes shape to pull actin.
- CAttachment of new $ATP$ to myosin head. The cross-bridge detaches.
- DSplitting of $ATP$ into $ADP$ and $Pi$. Myosin cocks into its high-energy conformation.
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