0 -> cyclin_D_Cdk4_6
cyclin_D_Cdk4_6 -> 0
0 -> transcription_factor_E2F_active
transcription_factor_E2F_active -> 0
0 -> cyclin_E_Cdk2
cyclin_E_Cdk2 -> 0
0 -> cyclin_A_Cdk2
cyclin_A_Cdk2 -> 0
0 -> cyclin_B_Cdk1
cyclin_B_Cdk1 -> 0
0 -> Cdc20_active
Cdc20_active -> 0