Cdc6 is regulated by E2F and is essential for DNA replication in mammalian cells.
Yan Z, DeGregori J, Shohet R, Leone G, Stillman B, Nevins JR, Williams RS. Cdc6 is regulated by E2F and is essential for DNA replication in mammalian cells. Proc Natl Acad Sci U S A. 1998 Mar 31; 95(7):3603-8.