V_2 V_10 V_n2 V_9 V_21 V_3 V_n2 V_2 V_5 V_n1 V_1 V_1 V_4 V_18 V_n1 V_n4 V_27 V_26 V_29 V_n1 V_28 V_6 V_20 V_n6 V_19 V_17 V_7 V_10 V_20 V_8 V_9 V_19 V_22 V_9 V_10 V_19 V_20 V_23 V_25 V_17 V_24 V_1 V_29 k1_ CycD_Cdk4 pRB_E2F k1__ CycD_Cdk4_p27 pRB_E2F k1 a_CyclinE_Cdk2 pRB_E2F kn1 k2 a_CyclinE_Cdk2 i_CyclinE_Cdk2 kn2 a_CyclinE_Cdk2 k3 E2F k3_ kn4 E2F k5 i_CyclinE_Cdk2 kn6 CycD_Cdk4 k8 p27 a_CyclinE_Cdk2 k9 p27 a_CyclinE_Cdk2 k10 CycE_Cdk2_p27 k17 p16 CycD_Cdk4 k18 E2F k19 p27 CycD_Cdk4 k20 CycD_Cdk4_p27 k21 a_CyclinE_Cdk2 2 k22 p27 k24 p16 k25 1 k25_ pRB 1 k26 1 k26_ p16 1 k28 pRB k29 pRB_P