Lariat mapping of a DBR1 CRISPR KO cell line

We used CRISPR in HEK293T cells to create two DBR1 knockout cell lines (C19 and C22). After high-throughput sequencing of total RNA extracted from these cells, we performed lariat read mapping using the method described in "Large-scale mapping of branchpoints in human pre-mRNA transcripts in vivo" (Taggart et al, 2012). We found lariats in the two DBR1- cell lines to be ~20-fold enriched relative to the levels observed in the HEK293T control samples. Lariat mapping of wild type and DBR1- HEK293T cells