(center map)
(1) DP2*:E2F4:p107*@nucleus - CDK6_Thr_pho:cyclin D1*:p27Kip1*@nucleus - CDK4_Thr172_pho:cyclin D1*:p27Kip1*@nucleus - CDK4:cyclin D1*:p21Cip*@nucleus - CDK6:cyclin D1*:p21Cip*@nucleus - CDK6_Thr_pho:cyclin D1*:p27Kip1*@nucleus -> DP2*:E2F4:p107*__pho@nucleus
(2) DP2*:E2F4:HDAC1:SIN3B:SUV39H1:p130*@nucleus - CDK2_Thr160_pho:cyclin E1*@nucleus - CDK6_Thr_pho:cyclin D1*:p27Kip1*@nucleus - CDK4_Thr172_pho:cyclin D1*:p27Kip1*@nucleus - CDK6:cyclin D1*:p21Cip*@nucleus - CDK4:cyclin D1*:p21Cip*@nucleus -> DP2*:E2F4:HDAC1:SIN3B:SUV39H1:p130*__pho@nucleus
(3) DP1*:E2F1:HDAC1:SWI/SNF:pRB*__pho@nucleus - CDK6_Thr_pho:cyclin D1*:p27Kip1*@nucleus - CDK4_Thr172_pho:cyclin D1*:p27Kip1*@nucleus - CDK4:cyclin D1*:p21Cip*@nucleus - CDK6:cyclin D1*:p21Cip*@nucleus -> HDAC1@nucleus+DP1*:E2F1:SWI/SNF:pRB*__pho__pho@nucleus
(4) p21Cip*@nucleus+CDK4:cyclin D1*@nucleus -> CDK4:cyclin D1*:p21Cip*@nucleus