library_construction_protocol: Cells were fixed with 1% formaldehyde for 10 min at room temperature. Then, 1.5 M glycine was added to the cells, followed by a 5-min incubation to stop the reaction. Chromatin digestion and immunoprecipitation were performed using the SimpleChIP Plus Enzymatic Chromatin IP Kit (Cell Signaling) with anti-AM-tag antibody (Active Motif) according to manufacturers' instructions. Sequencing libraries were prepared from the ChIP DNAs using the SMARTer ThruPLEX Tag-seq Kit (Clontech) according to the manufacturer's protocol. Single-read sequencing (150 bp) was performed on the DNBSEQ-G400RS sequencer (MGI Tech).