(center map)
(1) DP1*:E2F1:HDAC1:SWI/SNF:pRB*@nucleus - CDK3:cyclin C*@nucleus -> DP1*:E2F1:HDAC1:SWI/SNF:pRB*__pho@nucleus
(2) 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