The pBIND plasmids expressing GAL4-tagged cyclin D1 wild type and mutations were as described previously (57 (link)). The pcDNA3.1 plasmids encoding FLAG-tagged G9aWT and deletion mutations were obtained from Dr. Eiji Hara (Cancer Institute, Japanese Foundation for Cancer Research, Tokyo, Japan) (58 (link)). The pLKO lentiviral plasmid vectors of human G9a shRNA and GLP shRNA were purchased from Sigma.