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High-throughput chromatin accessibility profiling at single-cell resolution

By Anja Mezger, Sandy Klemm, Ishminder Mann, Kara Brower, Alain Mir, Magnolia Bostick, Andrew Farmer, Polly M Fordyce, Sten Linnarsson, William Greenleaf

Posted 28 Apr 2018
bioRxiv DOI: 10.1101/310284 (published DOI: 10.1038/s41467-018-05887-x)

We have developed a high-throughput single-cell ATAC-seq (assay for transposition of accessible chromatin) method to measure physical access to DNA in whole cells. Our approach integrates fluorescence imaging and addressable reagent deposition across a massively parallel (5184) nano-well array, yielding a nearly 20-fold improvement in throughput (up to ~1800 cells/chip, 4-5 hour on-chip processing time) and cost (~98ยข per cell) compared to prior microfluidic implementations. We applied this method to measure regulatory variation in Peripheral Blood Mononuclear Cells (PBMCs) and show robust, de- novo clustering of single cells by hematopoietic cell type.

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