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identifies accessible DNA regions by sequencing DNase I cut sites

DNase-seq, also known as DNase I hypersensitive sites sequencing, is a technique used to identify regions of the genome that are accessible and likely to be involved in gene regulation. By treating DNA with the enzyme DNase I, which cuts DNA at these accessible sites, researchers can sequence the resulting fragments to map areas where regulatory proteins, such as transcription factors, are likely to bind. This method helps in understanding how genes are turned on or off in different cell types and conditions.