For ChIP-seq, cells were crosslinked and chromatin was prepared according to a previous report (Nat. Protoc. 3, 1032–1045) with modifications. For RNA-seq, total RNA was purified using Isogen (Nippon Gene), and treated with DNaseI to digest genomic DNA. ChIP-seq and RNA-seq libraries were prepared using NEBNext Ultra DNA Library Prep Kit for Illumina (NEB) and NEBNext Ultra Directional RNA Library Prep Kit for Illumina (NEB), respectively, according to manufacturer's instructions.