SRR094815 GSM638317_1 SRX038917 GSM638317: H3K27me3 ChIP-seq in HSPC read_name_barcode_proc_directive ignore SRR094816 GSM638318_1 SRX038918 GSM638318: H3K79me2 ChIP-seq in HSPC read_name_barcode_proc_directive ignore SRR094817 GSM638319_1 SRX038919 GSM638319: RNAP2 ChIP-Seq in HSPC, run 1 read_name_barcode_proc_directive ignore SRR094818 GSM638320_1 SRX038920 GSM638320: RNAP2 ChIP-Seq in HSPC, run 2 read_name_barcode_proc_directive ignore quality_book_char @ quality_scoring_system log odds