The standard eukaryotic cell cycle consists of four phases: G1, S, G2, and M phases. There are three phase transitions in a cell cycle: G1/S to initiate DNA synthesis, G2/M to enter mitosis ...

In order to move from one phase of its life cycle to the ... checkpoint takes place later in the cell cycle, just before a cell moves from G 2 to mitosis. Here, a number of proteins scrutinize ...