a, Immunoblots on sucrose gradient fractions. b, Sucrose gradient fractions 20ā22 immunoprecipitated with a TRIM37, EZH2 or SUZ12 antibody, or an IgG control, were analysed by immunoblotting. cāe, Venn diagrams showing overlap between TRIM37- and EZH2-bound genes (c) and TRIM37-bound and H3K27me3-enriched genes in parental MCF7 cells (d) or following knockdown of TRIM37 (e). See also Supplementary Tables 3 and 4. f, BMI1 and EZH2 ChIP in MCF7 cells expressing a NS or TRIM37 shRNA. Error bars indicate SD; n=3 technical replicates of a representative experiment (out of three experiments). g, H3K27me3 ChIP in MCF7 cells. Error bars indicate SD; n=3 technical replicates of a representative experiment (out of three experiments). h, qRT-PCR monitoring TRIM37 target gene expression in BMI1 or EZH2 knockdown MCF7 cells. Error bars indicate SEM; n=3 technical replicates of a representative experiment (out of three experiments). *P<0.05; **P<0.01.