(1) CDK4_NF_don@cell+p16INK4a*@cell - SERTAD1@cell -> CDK4:p16INK4a*@cell (2) CDK4_NF_don@cell+p15INK4b*@cell -> CDK4:p15INK4b*@cell (3) CDK4_NF_don@cell+CDC37@cell -> CDC37:CDK4_NF_don@cell