treatment protocol: https://www.encodeproject.org/documents/126ea2fb-4317-4831-bd4f-f913a68a2513/@@download/attachment/ggr.keratinocyte.khavari-lab.chip-seq.formaldehyde-crosslinking.pdf general protocol: https://www.encodeproject.org/documents/24bcc910-0b81-4894-9904-12940effaa1c/@@download/attachment/ggr.keratinocyte.snyder-lab.chip-seq.overview.pdf general protocol: https://www.encodeproject.org/documents/d6db732c-648d-48b5-8e41-100502ad7ef2/@@download/attachment/ggr.keratinocyte.snyder-lab.chip-seq.branson_truseq.pdf