Abstract:While pooled loss-and gain-of-function screening approaches have become increasingly popular to systematically investigate mammalian gene function, they have thus far ignored the fact that cell populations are heterogeneous. Here we introduce multi-level barcoded sgRNA libraries to (i) monitor differences in the behavior of multiplexed clonal cell lines, (ii) trace sub-clonal lineages of cells expressing the same sgRNA, (iii) derive in-sample screen replicates and (iv) reduce the number of cells and sequencing… Show more
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