Figure 1
From: Phylogenetic analysis of cell-cycle regulatory proteins within the Symbiodiniaceae

The generalised cell cycle in eumetazoans illustrating the cell-cycle phase and regulatory checkpoints (grey ovals) with their complementary criteria that must be met for the cell cycle to progress through that checkpoint. Blue lines depict the formation of cell-cycle phase associated CDK-cyclin complexes in Homo sapiens. SAC Spindle Assembly Checkpoint.