SRR094941 GSM656523_1 SRX039033 GSM656523: Ring1b ChIP-Seq in mES cells read_name_barcode_proc_directive ignore SRR094942 GSM656525_1 SRX039034 GSM656525: REST ChIP-Seq in mES cells read_name_barcode_proc_directive ignore SRR094943 GSM656526_1 SRX039035 GSM656526: MCAF1 ChIP-Seq in mES cells quality_book_char @ quality_scoring_system log odds SRR094944 GSM656527_1 SRX039036 GSM656527: H4K20me3 ChIP-Seq in mES cells quality_book_char @ quality_scoring_system log odds