Cyclin E

Cyclin E is a protein that plays a key role in cell division. It helps cells prepare to duplicate their DNA during the cell cycle’s transition from growth (G1 phase) to DNA replication (S phase). By activating other proteins, Cyclin E ensures cells only divide when appropriate. Proper regulation is crucial; too much or too little can lead to problems like uncontrolled cell growth, which is associated with cancer. Essentially, Cyclin E acts as a gatekeeper, coordinating the timing of cell division to maintain healthy tissue function.