SCFcyclin F and APC/CCdh1 constitute a reciprocal feedback circuit
Cyclin F is targeted for ubiquitylation and degradation by APC/CCdh1 in G1 phase
Cdh1 is targeted for ubiquitylation and degradation by SCFcyclin F in S-phase
Cyclin F contributes to Cdh1 degradation, APC/C inactivation, and S-phase entry