Control of the cell cycle
Why?
Checkpoints stop the cell cycle if DNA is damaged or the cell is not ready, and cyclin proteins drive it forward.
A traffic light at each checkpoint turns red when a DNA break is found and green again once it is repaired.
Press the button to move a cell through the checkpoints of its cycle.
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Drag the picture to look around.
Cyclin levels rise and fall like a wave on a graph, each peak pushing the cell into the next stage.
Interactive labs
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