1 Institute for Systems Genetics, New York University Langone Medical Center, New York, NY 10016, USA; Department of Pathology, New York University Langone Medical Center, New York, NY 10016, USA.
2 Department of Genome Sciences, University of Washington, Seattle, WA 98115, USA; Division of Oncology, Department of Medicine, University of Washington, Seattle, WA 98115, USA. Electronic address: jstam@u.washington.edu.
Three recent studies measure individual variation in regulatory DNA accessibility. What do they tell us about the prospects of assessing variation in single cells and across populations?