Regulation of Cell Cycle

What happens when 2 cells at different points in the cell cycle and fused together?

the cell FUTHER along in the cell cycle would influence what happens to the less mature cell

What do cell cycle checkpoints do?

check if a cell's internal conditions are good enough for it to move on to the next phase

Where are cell cycle checkpoints located?

After... G1 phase, G2 phase, and M phase

Cyclins

molecules that allow a cell to move through the cell cycle

Cyclin-dependent kinases

kinases that depend on cyclins to activate them

MPF

Mitosis-promoting factor - helps move past the checkpoint after G2 phase

How is MPF formed?

a cyclin binds to a CDK (cyclin-dependent kinase)

What happens to MPF after the cell passes the G2 checkpoint?

cyclin breaks down, leaving just CDK