SRX076077 SRA037869 Young_ctl_H3K27me3_ChIPSeq Young_ctl_H3K27me3_ChIPSeq H3K27me3|Whole worm, young, control, H3K27me3 ChIP H3K27me3 N2|Whole worm, young, control, H3K27me3 ChIP|whole body N2 ChIP-Seq