The G2 checkpoint is a crucial control mechanism in the cell cycle, ensuring that the cell is fully prepared to enter mitosis (M phase). This checkpoint occurs after DNA replication (S phase) and before mitosis. It primarily checks for DNA damage, completeness of DNA replication, and overall cell size. If any abnormalities are detected, the cell cycle is halted to allow for repair or, if damage is irreparable, to induce apoptosis.
