(center map)
(1) CDK4@cell+p16INK4a*@cell - SERTAD1@cell -> CDK4:p16INK4a*@cell
(2) CDK4@cell+cyclin D1*@cell -> CDK4:cyclin D1*@cell
(3) CDC37:CDK4:HSP90_hm2@cell -> CDK4@cell+CDC37:HSP90_hm2@cell
(4) CDK4:cyclin D1*_Thr286_pho@cell -> cyclin D1*_Thr286_pho@cell+CDK4@cell