ChIP was performed as in Matzat LH, Dale RK, Moshkovich N, Lei EP (2012) Tissue-specific regulation of chromatin insulator function. PLoS Genet 8: e1003069 ChIP was performed as in Matzat LH, Dale RK, Moshkovich N, Lei EP (2012) Tissue-specific regulation of chromatin insulator function. PLoS Genet 8: e1003069. “a” or “b” in filenames indicates which of 2 chromatin preps was used