Figure 5.
Schematic diagram of cell cycle checkpoints in relation to cell cycle phases. The DNA damage, DNA replication, and mitotic/spindle-kinetochore checkpoints are shown with a corresponding list of a subset of human and S cerevisiae genes that function at each of the checkpoints. The sensor proteins and downstream signal transduction and effector proteins are listed for the DNA replication checkpoints in S phase. The proteins listed at the other checkpoints operate as sensor, transducers, or effector proteins.