DNA Double Strand Breaks DNA Double Strand Breaks, Replication Stress, UV cdc25A cdc25C cdc25C p21 Dbf4 Cyclin E Cyclin E Cyclin B Cyclin B 14-3-3 G1 S G2 M {{ board.text }} {{ group.title }} {{ text.text }} {{ button.text }} {{ group.title }} {{ text.text }} Notes: 1:Clickable 2:Unclickable