SRR099834 GSM672400_1 SRX041878 GSM672400: DP T cell wt CTCF SRR099835 GSM672401_1 SRX041879 GSM672401: Pro-B cell Rag2-/- CTCF SRR099836 GSM672402_1 SRX041880 GSM672402: Mature B cell CTCF SRR099837 GSM672403_1 SRX041881 GSM672403: Pro-B cell Rad21