In order to activate endogenous CDK13 we used a CRISPR-Cas9 complex with three SAM components: dCas9–VP64 (Addgene #61425),MS2–p65–HSF1(Addgene, #61426), and sgRNA (Addgene, #89493) as described previously [31 (link)]. gRNAs were designed using the online optimized CRISPR design tool (http://crispr.mit.edu) and targeted the proximal promoter regions of CDK13. Oligos, synthesized by Sangon Biotech., (Shanghai, China), were annealed and sub-cloned into the lentiGuide-puro vector.
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