ChIP-seq data:
When present, technical and biological replicates were merged together to generate a new sample. For example sample 'ES H3K27me3' is the result of merging 3 replicates: 'ES H3K27me3 TechRep-a1', 'ES H3K27me3 TechRep-a2' and 'ES H3K27me3 BioRep-b1'.
FASTQ files were extracted from SRA files using fastq-dump (SRA toolkit v2.5.0) and mapped to the genome using Bowtie v0.12.8. SAM files were then converted into bam using samtools v0.1.14 and to bed using bamToBed v2.12.0 (bedtools). SGA conversion was carried out using bed2sga.pl (ChIP-Seq v. 1.5.2).