SRX4082373 SRA703806 H3K27me3_wt_l1_rep2;_Caenorhabditis_elegans;_ChIP-Seq H3K27me3_wt_l1_rep2;_Caenorhabditis_elegans;_Ch... H3K27me3|L1 larvae H3K27me3 N2|L1 larvae N2 ChIP-Seq