SRX4082371 SRA703806 H3K27me3_wt_emb_rep2;_Caenorhabditis_elegans;_ChIP-Seq H3K27me3_wt_emb_rep2;_Caenorhabditis_elegans;_C... H3K27me3|mixed embryos H3K27me3 N2|mixed embryos N2 ChIP-Seq