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PRC1 and PRC2 bind to the promoters of redundantly silenced genes. ChIP analysis of Ring1B (A), Suz12 (B), and H3K27me3 (C) binding to gene promoters in wild-type, Eed-deficient, and Ring1B-deficient ES cells. H3K27me3 signal is normalized to histone H3, and Ring1B and Suz12 are represented as percent input. Error bars represent standard deviation.
