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Our project uses novel methods for epigenomic profiling that detect 3D contact sites without cross-linking and with much higher resolution than current technologies. We recently introduced a novel strategy for chromatin profiling called CUT&RUN (Cleavage Under Targets & Release Using Nuclease), in which antibody-targeted controlled cleavage by micrococcal nuclease releases specific protein-DNA complexes into the supernatant for paired-end DNA sequencing. The method yields precise transcription factor (TF) profiles, yet is simple to perform and is inherently robust, with extremely low backgrounds requiring ~1/10 th the sequencing depth of chromatin immunoprecipitation (ChIP). CUT&RUN binding and cleavage occurs in situ, allowing for both quantitative high-resolution chromatin mapping and probing of the 3D chromatin environment. 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